0000766829-21-000127 | 10-Q | XBRL Viewer

Document and Entity Information Document - shares	9 Months Ended
Document and Entity Information Document - shares	Sep. 30, 2021	Oct. 22, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
Entity File Number	1-8966
Entity Registrant Name	SJW GROUP
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	77-0066628
Entity Address, Address Line One	110 West Taylor Street,
Entity Address, City or Town	San Jose,
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95110
City Area Code	(408)
Local Phone Number	279-7800
Title of 12(b) Security	Common Stock, par value $0.001 per share
Trading Symbol	SJW
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		29,826,233
Entity Central Index Key	0000766829
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Amendment Flag	false

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
REVENUE	$ 166,923	$ 165,863	$ 433,949	$ 428,826
Production Expenses:
Purchased water	33,121	35,130	76,434	76,953
Power	4,179	3,994	10,573	10,145
Groundwater extraction charges	23,736	20,471	59,419	54,082
Other production expenses	11,069	10,092	30,302	30,465
Total production expenses	72,105	69,687	176,728	171,645
Administrative and general	22,713	19,529	64,932	58,917
Maintenance	6,369	4,550	19,221	15,970
Property taxes and other non-income taxes	8,125	7,797	22,789	22,362
Depreciation and amortization	23,837	22,417	70,787	66,552
Total operating expense	133,149	123,980	354,457	335,446
OPERATING INCOME	33,774	41,883	79,492	93,380
OTHER (EXPENSE) INCOME:
Interest on long-term debt and other interest expense	(13,535)	(13,174)	(40,655)	(39,638)
Pension non-service cost	334	(218)	999	(270)
Gain on sale of Texas Water Alliance	0	0	3,000	0
Gain on sale of real estate investments	0	1,050	0	1,050
Other, net	1,244	1,130	4,782	2,935
Income before income taxes	21,817	30,671	47,618	57,457
Provision for income taxes	2,749	4,578	5,159	9,226
NET INCOME	19,068	26,093	42,459	48,231
Other comprehensive (loss) income, net	(12)	76	133	(49)
COMPREHENSIVE INCOME	$ 19,056	$ 26,169	$ 42,592	$ 48,182
EARNINGS PER SHARE
Basic (usd per share)	$ 0.64	$ 0.91	$ 1.44	$ 1.69
Diluted (usd per share)	0.64	0.91	1.43	1.68
DIVIDENDS PER SHARE (usd per share)	$ 0.34	$ 0.32	$ 1.02	$ 0.96
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic (shares)	29,816,736	28,533,907	29,496,533	28,510,489
Diluted (shares)	29,952,477	28,703,343	29,625,784	28,687,012

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Utility plant:
Land	$ 38,885	$ 36,845
Depreciable plant and equipment	3,318,451	3,198,060
Construction in progress	163,262	109,976
Intangible assets	37,347	35,167
Property, plant, and equipment, gross	3,557,945	3,380,048
Less accumulated depreciation and amortization	1,114,123	1,045,136
Public utilities, property, plant and equipment, net	2,443,822	2,334,912
Real estate investments	58,765	58,129
Less accumulated depreciation and amortization	15,655	14,783
Real estate investments, net	43,110	43,346
Cash and cash equivalents:
Cash	14,019	5,269
Restricted cash	2,202	4,000
Accounts receivable:
Customers, net of allowances for uncollectible accounts of $4,272 and $3,891 on September 30, 2021 and December 31, 2020, respectively	58,725	46,832
Income tax	2,148	7,041
Other	4,342	4,269
Accrued unbilled utility revenue	52,631	44,950
Prepaid expenses	13,048	8,097
Current regulatory assets, net	3,249	1,748
Other current assets	5,149	5,125
Total current assets	155,513	127,331
OTHER ASSETS:
Net regulatory assets, less current portion	178,861	156,482
Investments	15,289	14,367
Goodwill	628,144	628,144
Other	5,002	6,883
Total other assets	827,296	805,876
Total assets	3,469,741	3,311,465
Stockholders’ equity:
Common stock, $0.001 par value; authorized 70,000,000 shares; issued and outstanding shares 29,822,182 on September 30, 2021 and 28,556,605 on December 31, 2020	30	29
Additional paid-in capital	581,201	510,158
Retained earnings	420,411	408,037
Accumulated other comprehensive income	(931)	(1,064)
Total stockholders’ equity	1,000,711	917,160
Long-term debt, less current portion	1,420,032	1,287,580
Capitalization, long-term debt and equity	2,420,743	2,204,740
CURRENT LIABILITIES:
Line of credit	122,072	175,094
Current portion of long-term debt	26,288	76,241
Accrued groundwater extraction charges, purchased water and power	29,030	19,184
Accounts payable	37,410	34,200
Accrued interest	17,642	12,861
Accrued payroll	13,231	14,012
Other current liabilities	21,612	19,203
Total current liabilities	267,285	350,795
DEFERRED INCOME TAXES	193,366	191,415
ADVANCES FOR CONSTRUCTION	132,228	125,027
CONTRIBUTIONS IN AID OF CONSTRUCTION	305,487	296,105
POSTRETIREMENT BENEFIT PLANS	125,005	121,597
OTHER NONCURRENT LIABILITIES	25,627	21,786
COMMITMENTS AND CONTINGENCIES (See Note 12)
Total capitalization and liabilities	$ 3,469,741	$ 3,311,465

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
CURRENT ASSETS:
Allowance for uncollectible accounts	$ 4,272	$ 3,891
CAPITALIZATION:
Common stock, par value (usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized (shares)	70,000,000	70,000,000
Common stock, shares issued (shares)	29,822,182	28,556,605
Common stock, shares outstanding (shares)	29,822,182	28,556,605

Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income
Beginning balance (in shares) at Dec. 31, 2019		28,456,508
Beginning balance at Dec. 31, 2019	$ 889,984	$ 28	$ 506,639	$ 383,191	$ 126
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,417			2,417
Unrealized gain (loss) on investment, net of tax	(135)				(135)
Stock-based compensation	208		251	(43)
Issuance of restricted and deferred stock units (in shares)		25,781
Issuance of restricted and deferred stock units	(785)		(785)
Employee stock purchase plan (in shares)		15,552
Employee stock purchase plan	970		970
Dividends paid	(9,118)			(9,118)
Ending balance (in shares) at Mar. 31, 2020		28,497,841
Ending balance at Mar. 31, 2020	883,541	$ 28	507,075	376,447	(9)
Beginning balance (in shares) at Dec. 31, 2019		28,456,508
Beginning balance at Dec. 31, 2019	889,984	$ 28	506,639	383,191	126
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	48,231
Ending balance (in shares) at Sep. 30, 2020		28,552,177
Ending balance at Sep. 30, 2020	913,061	$ 29	509,031	403,923	78
Beginning balance (in shares) at Mar. 31, 2020		28,497,841
Beginning balance at Mar. 31, 2020	883,541	$ 28	507,075	376,447	(9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	19,721			19,721
Unrealized gain (loss) on investment, net of tax	10				10
Stock-based compensation	966		1,009	(43)
Issuance of restricted and deferred stock units (in shares)		18,864
Issuance of restricted and deferred stock units	15	$ 1	14
Dividends paid	(9,122)			(9,122)
Ending balance (in shares) at Jun. 30, 2020		28,516,705
Ending balance at Jun. 30, 2020	895,131	$ 29	508,098	387,003	1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	26,093			26,093
Unrealized gain (loss) on investment, net of tax	77				77
Stock-based compensation	1,016		1,058	(42)
Issuance of restricted and deferred stock units (in shares)		19,274
Issuance of restricted and deferred stock units	(985)		(985)
Employee stock purchase plan (in shares)		16,198
Employee stock purchase plan	860		860
Dividends paid	(9,131)			(9,131)
Ending balance (in shares) at Sep. 30, 2020		28,552,177
Ending balance at Sep. 30, 2020	$ 913,061	$ 29	509,031	403,923	78
Beginning balance (in shares) at Dec. 31, 2020	28,556,605	28,556,605
Beginning balance at Dec. 31, 2020	$ 917,160	$ 29	510,158	408,037	(1,064)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,616			2,616
Unrealized gain (loss) on investment, net of tax	38				38
Stock-based compensation	1,248		1,280	(32)
Issuance of restricted and deferred stock units (in shares)		30,547
Issuance of restricted and deferred stock units	(964)		(964)
Employee stock purchase plan (in shares)		18,235
Employee stock purchase plan	1,026		1,026
Common stock issuance, net of costs (in shares)		1,184,500
Common stock issuance, net of costs	66,896	$ 1	66,895
Dividends paid	(9,724)			(9,724)
Ending balance (in shares) at Mar. 31, 2021		29,789,887
Ending balance at Mar. 31, 2021	$ 978,296	$ 30	578,395	400,897	(1,026)
Beginning balance (in shares) at Dec. 31, 2020	28,556,605	28,556,605
Beginning balance at Dec. 31, 2020	$ 917,160	$ 29	510,158	408,037	(1,064)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 42,459
Ending balance (in shares) at Sep. 30, 2021	29,822,182	29,822,182
Ending balance at Sep. 30, 2021	$ 1,000,711	$ 30	581,201	420,411	(931)
Beginning balance (in shares) at Mar. 31, 2021		29,789,887
Beginning balance at Mar. 31, 2021	978,296	$ 30	578,395	400,897	(1,026)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	20,775			20,775
Unrealized gain (loss) on investment, net of tax	107				107
Stock-based compensation	763		791	(28)
Issuance of restricted and deferred stock units (in shares)		15,040
Issuance of restricted and deferred stock units	(9)		(9)
Common stock issuance, net of costs	(120)		(120)
Dividends paid	(10,133)			(10,133)
Ending balance (in shares) at Jun. 30, 2021		29,804,927
Ending balance at Jun. 30, 2021	989,679	$ 30	579,057	411,511	(919)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	19,068			19,068
Unrealized gain (loss) on investment, net of tax	(12)				(12)
Stock-based compensation	1,101		1,130	(29)
Issuance of restricted and deferred stock units (in shares)		186
Issuance of restricted and deferred stock units	14		14
Employee stock purchase plan (in shares)		17,069
Employee stock purchase plan	1,000		1,000
Dividends paid	$ (10,139)			(10,139)
Ending balance (in shares) at Sep. 30, 2021	29,822,182	29,822,182
Ending balance at Sep. 30, 2021	$ 1,000,711	$ 30	$ 581,201	$ 420,411	$ (931)

Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020
Statement of Stockholders' Equity [Abstract]
Unrealized gain (loss) on investment, tax	$ (4)	$ 39	$ 14	$ 28	$ 4	$ (50)
Dividends per share (usd per share)	$ 0.34	$ 0.34	$ 0.34	$ 0.32	$ 0.32	$ 0.32

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
OPERATING ACTIVITIES:
Net income	$ 42,459	$ 48,231
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	71,912	68,683
Deferred income taxes	4,140	(6,358)
Stock-based compensation	3,201	2,318
Allowance for equity funds used during construction	(1,490)	0
Gain on sale of Texas Water Alliance and real estate investments	(3,000)	(1,050)
Changes in operating assets and liabilities:
Accounts receivable and accrued unbilled utility revenue	(19,647)	(34,491)
Accounts payable and other current liabilities	3,697	(3,877)
Accrued groundwater extraction charges, purchased water and power	9,846	10,396
Tax receivable and payable, and other accrued taxes	832	6,459
Postretirement benefits	265	408
Regulatory assets and liabilities excluding income tax temporary differences, net and postretirement benefits	(12,418)	(14,086)
Up-front service concession payment	0	(5,000)
Other changes, net	458	(1,018)
NET CASH PROVIDED BY OPERATING ACTIVITIES	100,255	70,615
INVESTING ACTIVITIES:
Company-funded	(169,238)	(130,426)
Contributions in aid of construction	(12,520)	(9,584)
Additions to real estate investments	(606)	(391)
Payments to retire utility plant, net of salvage	(3,535)	(1,877)
Proceeds from sale of Texas Water Alliance and real estate investments	3,000	1,068
NET CASH USED IN INVESTING ACTIVITIES	(182,899)	(141,210)
FINANCING ACTIVITIES:
Borrowings on line of credit	67,099	226,884
Repayments on line of credit	(120,120)	(218,290)
Long-term borrowings	137,000	85,000
Repayments of long-term borrowings	(52,700)	(9,589)
Issuance of common stock, net of issuance costs	66,775	0
Debt issuance costs	(843)	(646)
Dividends paid	(29,996)	(27,371)
Receipts of advances and contributions in aid of construction	23,585	19,059
Refunds of advances for construction	(2,179)	(2,121)
Other changes, net	975	(64)
NET CASH PROVIDED BY FINANCING ACTIVITIES	89,596	72,862
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	6,952	2,267
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, BEGINNING OF PERIOD	9,269	17,944
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, END OF PERIOD	16,221	20,211
LESS RESTRICTED CASH, END OF PERIOD	2,202	0
CASH AND CASH EQUIVALENTS, END OF PERIOD	14,019	20,211
Cash paid during the period for:
Interest	39,533	40,409
Income taxes	7,643	7,024
Supplemental disclosure of non-cash activities:
Accrued payables for additions to utility plant	26,628	21,857
Change in accrued payables for construction costs capitalized	(209)	1,997
Utility property installed by developers	$ 1,527	$ 5,051

General

9 Months Ended

Sep. 30, 2021

Accounting Policies [Abstract]

General

In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all adjustments (consisting only of normal, recurring adjustments) necessary for a fair presentation of the results for the interim periods.

The unaudited interim financial information has been prepared in accordance with accounting principles generally accepted in the United States of America and in accordance with the instructions for Form 10-Q and Rule 10-01 of Regulation S-X promulgated by the Securities and Exchange Commission. The Notes to Consolidated Financial Statements in SJW Group’s 2020 Annual Report on Form 10-K should be read with the accompanying unaudited condensed consolidated financial statements.

Recently Adopted Accounting Principles

In December 2019, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2019-12, “Simplifying the Accounting for Income Taxes”, which simplifies the accounting for income taxes, eliminates certain exceptions within Topic 740, “Income Taxes”, and clarifies certain aspects of the current guidance to promote consistency among reporting entities. ASU 2019-12 was effective for SJW Group in the first quarter of fiscal 2021. The adoption of ASU 2019-12 did not have a material impact on the consolidated financial statements.

Revenue

Water sales are seasonal in nature and influenced by weather conditions. The timing of precipitation and climatic conditions can cause seasonal water consumption by customers to vary significantly. Due to the seasonal nature of the water business, the operating results for interim periods are not indicative of the operating results for a 12-month period. Revenue is generally higher in the warm, dry summer months when water usage and sales are greater, and lower in the winter months when cooler temperatures and increased precipitation curtail water usage resulting in lower sales.

The major streams of revenue for SJW Group are as follows:


	Three months ended September 30,			Nine months ended September 30,
	2021		2020	2021		2020
Revenue from contracts with customers	$	163,103	167,045	$	422,545	414,344
Alternative revenue programs, net	2,216		1,324	4,984		4,877
Other balancing and memorandum accounts, net	639		1,532	3,637		11,743
Other regulatory mechanisms, net	(438)		(5,441)	(1,284)		(6,355)
Rental income	1,403		1,403	4,067		4,217
	$	166,923	165,863	$	433,949	428,826

Earnings per Share

Basic earnings per share is calculated using income available to common stockholders, divided by the weighted average number of shares outstanding during the period. Diluted earnings per share is calculated using income available to common stockholders divided by the weighted average number of shares of common stock including both shares outstanding and shares potentially issuable in connection with restricted common stock awards under SJW Group’s Long-Term Incentive Plan (as amended, the “Incentive Plan”), shares potentially issuable under the performance stock plans assumed through the business combination with Connecticut Water Service, Inc. (“CTWS”), and shares potentially issuable under the Employee Stock Purchase Plan (“ESPP”). For the three months ended September 30, 2021 and 2020, 1,558 and 1,029 anti-dilutive restricted common stock units were excluded from the dilutive earnings per share calculation, respectively. For the nine months ended September 30, 2021 and 2020, 14,441 and 20,220 anti-dilutive restricted common stock units were excluded from the dilutive earnings per share calculation, respectively.

Real Estate Investments

The major components of real estate investments as of September 30, 2021, and December 31, 2020, are as follows:


	September 30, 2021		December 31, 2020
Land	$	14,168	14,168
Buildings and improvements	44,597		43,961

Subtotal	58,765		58,129
Less: accumulated depreciation and amortization	15,655		14,783
Total	$	43,110	43,346

A former wholly owned subsidiary of SJW Group, Texas Water Alliance Limited was sold to Guadalupe-Blanco River Authority (“GBRA”) in 2017. The sales agreement with GBRA included a holdback amount of $3,000 to be paid to SJW Group on June 30, 2021, subject to reduction under certain conditions. SJW Group received the holdback amount without reduction from the GBRA on June 29, 2021 and recognized a pre-tax gain on sale of $3,000.

On September 28, 2020, San Jose Water Company sold six nonutility properties located in Los Gatos, California for $1,075. SJW Group recognized a pre-tax gain on the sale of real estate investments of $1,048, net of selling expenses of $22.

Regulatory Rate Filings	9 Months Ended
Regulatory Rate Filings	Sep. 30, 2021
Regulated Operations [Abstract]
Regulatory Rate Filings	Regulatory Rate Filings California Regulatory Affairs On March 17, 2020, the California Public Utilities Commission (“CPUC”) ordered its regulated water utilities to halt customer disconnection activities in connection with the COVID-19 pandemic. On April 2, 2020, California Governor Gavin Newsom issued Executive Order N-42-20 suspending customer disconnection activities until further notice. On April 16, 2020, the CPUC issued Resolution M-4842 directing utilities to implement emergency customer protections to assist customers such as waiving reconnection deposits, offering payment arrangements, and suspending disconnections for nonpayment. This resolution was effective for up to one year, or April 15, 2021, with the option to extend. On February 11, 2021, the CPUC approved Resolution M-4849 extending customer protections required in Resolution M-4842 through June 30, 2021. The resolution also requires water utilities to develop a transition plan regarding shutoffs and terminations with customers once the moratorium ends. On April 1, 2021, San Jose Water Company (“SJWC”) filed Advice Letter 560 which includes such plan and the filing was approved on June 16, 2021. On June 11, 2021, Governor Newsom issued Executive Order N-08-21 which ends the suspension on customer disconnection activities on September 30, 2021. On June 16, 2021, the CPUC directed its regulated water utilities to extend the suspension on customer disconnection activities through September 30, 2021, in response to the Governor’s order. On June 23, 2021, SJWC filed Advice Letter 565 to extend Resolution M-4849’s emergency customer protections through September 30, 2021. This advice letter was approved on July 1, 2021. On September 23, 2021, Governor Newsom approved Senate Bill 155, which included a provision extending the water shutoff moratorium through December 31, 2021. SJWC filed Advice Letter 556 on November 16, 2020, with the CPUC requesting authorization to increase its revenue requirement by $11,750 or 3.04% in 2021 for the final escalation year authorized in our 2018 General Rate Case Decision 18-011-025 which established rates for 2019, 2020, and 2021. This advice letter was approved on December 17, 2020, and new rates became effective January 1, 2021. On January 4, 2021, SJWC filed General Rate Case Application No. 21-01-003 requesting authority for an increase of revenue of $51,585 or 13.35% in 2022, $16,932 or 3.88% in 2023, and $19,195 or 4.24% in 2024. The application also includes requests to recover $18,499 from balancing and memorandum accounts, authorization for a $435,000 capital budget, further alignment between actual and authorized usage, and a shift to greater revenue collection in the service charge. The application will undergo a year-long review process and new rates, if approved, are expected to be effective by the second quarter of 2022. SJWC will file for interim rates to be effective on January 1, 2022. On May 3, 2021, SJWC filed Application No. 21-05-004 requesting authority to adjust its cost of capital for the period from January 1, 2022 through December 31, 2024. The request seeks a revenue increase of $6,418 or 1.61% in 2022. The application also proposes a rate of return of 8.11% from the current rate of 7.64%, a decrease in the average cost of debt rate from 6.20% to 5.48%, and a return of equity of 10.30% from the current rate of 8.90%. In addition, the request seeks to adjust SJWC’s currently authorized capital structure of approximately 47% debt and 53% equity to approximately 45% debt and 55% equity. If approved, rates are expected to be effective in the second quarter of 2022. On May 27, 2021, SJWC filed Advice Letter No. 561/561A with the CPUC requesting authorization to increase revenue by $17,262 or 4.34% to recover the increases to purchased potable water charges, the groundwater extraction fee, and purchased recycled water charges implemented by Santa Clara Valley Water District (“Valley Water”) and South Bay Water Recycling. This advice letter was approved with an effective date of July 1, 2021. On June 9, 2021, Valley Water declared a water shortage emergency and asked its retailers to reduce consumption by 15% based on 2019’s volume. On June 18, 2021, SJWC filed Advice Letter 563 with the CPUC to activate Stage 3 of its Rule 14.1, Water Shortage Contingency Plan, in response to Valley Water’s declaration of drought emergency and call for 15% mandatory conservation. Advice Letter 564 was also filed on June 9, 2021, to establish a Water Conservation Memorandum Account to track the revenue impact of authorized vs actual water consumption and the incremental expenses required to implement our mandatory water conservation plan. Similar memorandum accounts were authorized during the previous drought. Advice Letters 564 and 563 were approved with the effective dates of July 20, 2021, and August 5, 2021, respectively. On August 5, 2021, SJWC filed Advice Letter 567 with the CPUC requesting authorization to update its Drought Allocations and Drought Surcharges program contained within its Schedule 14.1. This filing updates the program developed during the drought of 2014-2017. Advice Letter 567 was approved with an effective date of September 6, 2021. This approval does not authorize its activation. SJWC will submit another filing with the commission to activate the program should water supply conditions dictate or if it is required to do so by the CPUC and/or the State of California. On October 15, 2021, SJWC filed Advice Letter 569 with the CPUC requesting authorization to activate Schedule 14.1 effective November 15, 2021, as approved in Advice Letter 567. If approved, drought surcharges collected will be used to offset the revenue losses tracked in the Water Conservation Memorandum Account authorized in Advice Letter 564. This filing is pending before the CPUC. Connecticut Regulatory Affairs On October 28, 2020, The Connecticut Water Company (“Connecticut Water”) filed a Water Infrastructure Conservation Adjustment (“WICA”) application representing an additional 1.11% surcharge or approximately $956 increase in revenues, for a cumulative WICA surcharge of 6.94%. The Public Utilities Regulatory Authority of Connecticut (“PURA”) approved the requested increase with an April 1, 2021, effective date. Additionally, on February 1, 2021, Connecticut Water filed its annual WICA reconciliation which called for a 0.09% increase of the WICA surcharge. On March 3, 2021, PURA approved the reconciliation, resulting in a net cumulative 7.03% surcharge for Connecticut Water which became effective on customers’ bills on April 1, 2021. The WICA surcharge was reset to zero as part of the July 28, 2021, rate case decision. On October 26, 2021, Connecticut Water filed for a WICA increase for approximately $21,746 in completed projects. Many of the projects were those that were not considered by PURA in the rate case because of the deadline in the proceeding for pro forma capital additions. If approved as submitted, Connecticut Water expects a WICA surcharge of 2.49% to be added to customer bills in January 2022 which is expected to generate approximately $2,581 in additional revenue. Prior to being reset to zero concurrent with the new rates from the Connecticut Water rate proceeding effective July 28, 2021, WICA surcharges for Connecticut Water and its Avon Water division were 7.03% and 8.51%, respectively. The Heritage Village Water division did not have an approved WICA surcharge, but Connecticut Water is authorized in its July 28, 2021, rate case decision to include Heritage Village Water division in the WICA program in the future. On January 15, 2021, Connecticut Water filed an application with PURA to amend rates for its customers, including the divisions of Avon Water and Heritage Village Water. The filing requests an increase of $20,206 in annual revenues that includes more than $265,514 in completed infrastructure investments that are not currently in approved rates and surcharges. On July 28, 2021, Connecticut Water received the final decision approving an increase of $5,208 in annual revenues, a return on equity of 9.0%, with new rates effective July 28, 2021. The final decision also approved a low-income rate, tiered block rate structure for residential water customers and the cost of debt and equity percentage as requested. The final decision did not include all of the requested proforma plant in service due to the timing of its completion. However, no plant was disallowed. Connecticut Water will seek recovery for the projects in the future, including a portion of plant which is eligible for recovery through WICA. In addition, the final decision reset WICA, which was approaching its statutory caps to zero. On August 11, 2021, Connecticut Water filed a petition for reconsideration with PURA to consider matters specific to excess deferred income taxes contained in the July 28, 2021, decision. The proposed increased revenues associated with the petition is $2,229. On October 25, 2021, PURA issued a draft decision approving $1,752 of Connecticut Water’s request. A final decision on the matter is expected on November 10, 2021. Long-term debt issuances for Connecticut Water require regulatory authorization which is typically obtained for a specified amount of debt to be issued during a specified period of time. On March 16, 2021, Connecticut Water filed for PURA approval for the issuance of up to $100,000 of long-term borrowings in 2021. Connecticut Water anticipates to use the proceeds to pay down line of credit borrowings and payoff maturing debt, as well as general working capital needs. Connecticut Water received approval of the financings from PURA on June 9, 2021. Texas Regulatory Affairs On January 29, 2021, SJWTX, Inc., doing business as Canyon Lake Water Service Company (“CLWSC”) submitted its Water Pass-Through Charge (“WPC”) true-up report for the Canyon Lake area water systems’ 2020 purchased water costs. The WPC is the annual filing to change the monthly per thousand gallons charge for changes in purchased water costs since the last annual true-up report. The 2020 WPC true-up report resulted in a reduction of the WPC usage rate from $0.95 dollars to $0.70 dollars per thousand gallons which became effective on March 1, 2021. On August 18, 2021, the GBRA announced a 13% increase for treated water effective September 1, 2021. The Deer Creek Ranch water system has a separate WPC. A WPC filing for Deer Creek Ranch is required only when there is a change in purchased water costs. The WPC true-up report for this system was last submitted December 1, 2020, which resulted in a decrease in the usage charge from $2.02 to $1.84 dollars per thousand gallons, and an increase in the monthly base charge of $0.51 dollars per residential account. The Deer Creek Ranch WPC rate changes became effective February 25, 2021. A disaster declaration was issued on February 12, 2021, by the Public Utilities Commission of Texas (“PUCT”) because of severe winter weather. The PUCT issued orders under Docket No. 51812-6 which prohibited disconnections for non-payment, suspended the rules for late fees and interest, and allowed for estimated billing for the duration of the disaster declaration. On March 5, 2021, the PUCT reinstituted the utilities’ ability to resume charging late fees, and on June 15, 2021, removed the prohibition on disconnections for non-payment. The Texas Legislature passed Senate Bill 3 on August 6, 2021. Under this bill, utilities are obligated to report to the PUCT steps they are taking to mitigate for the type of long-term power outages experienced during the February 2021 storm. CLWSC expects to incur capital expenditures related to meeting these new requirements, largely for procurement of backup generators. On June 28, 2021, CLWSC announced that it reached an agreement to acquire the Kendall West and Bandera East utilities in Bandera and Medina counties in Texas and that change in ownership applications had been filed with the PUCT under Docket No. 52281. The acquisition, pending approval by the PUCT, would grow CLWSC by 1,400 service connections. Rates will remain the same for those customers of the acquired Certificate of Convenience and Necessity. A decision by the PUCT is expected in the fourth quarter of 2021. Maine Regulatory Affairs On June 17, 2020, the Maine Public Utilities Commission (“MPUC”) approved a general rate increase for Skowhegan Division customers allowing $198 in additional revenue. Per the MPUC decision, the increase will be implemented in two steps: an initial 9.80% rate increase effective June 15, 2020, and a 3.51% rate increase effective July 1, 2021. The combined rate increase is 13.31%. On November 23, 2020, The Maine Water Company (“Maine Water”) filed Water Infrastructure Surcharge (“WISC”) applications with the MPUC in five divisions requesting an increase between 1.1% and 5%, representing approximately $304 in additional revenues. The WISC applications were approved on December 15, 2020, and December 22, 2020 and the surcharges became effective January 1, 2021. On March 10, 2021, Maine Water filed a general rate increase application for the Biddeford Saco Division seeking approximately $6,659, or 77.5%, in additional revenue. The application proposed a three step, multi-year rate plan designed to ease the transition to higher water bills over the period from July 2021 to July 2023. The primary driver for the increase in rates is the support for a new drinking water treatment facility on the Saco River, a $60,000 project to replace the existing facility that is expected to be in service in the second quarter of 2022. On June 23, 2021, the MPUC approved the first step in the plan adopting the proposed rate smoothing mechanism and implementing a temporary 22.65% surcharge on all customer bills. The surcharge will be in effect for one year. Action on the rate increase request was deferred by agreement of the parties. On September 8, 2021, Maine Water filed a supplemental application to update its request to increase base rates, initiating the second step in the rate plan. The supplemental application seeks $6,880, or 80.1% in additional revenue primarily to support a new drinking water treatment facility on the Saco River. A decision on the requested revenue increase is expected in the second quarter of 2022, corresponding with the completion of the new water treatment facility.

Regulatory Assets, Net

9 Months Ended

Sep. 30, 2021

Regulatory Assets and Liabilities Disclosure [Abstract]

Regulatory Assets, Net

Regulatory assets, net are comprised of the following as of September 30, 2021, and December 31, 2020:


	September 30, 2021		December 31, 2020
Regulatory assets:
Income tax temporary differences, net	$	15,772	6,230
Postretirement pensions and other medical benefits	99,213		95,559
Business combinations debt premium, net	20,573		22,479
Balancing and memorandum accounts, net	33,277		25,463
Water Rate Adjustment	5,489		323
Other, net	7,786		8,176
Total regulatory assets, net in Condensed Consolidated Balance Sheets	182,110		158,230
Less: current regulatory assets, net	3,249		1,748
Total regulatory assets, net, less current portion	$	178,861	156,482

As of September 30, 2021, and December 31, 2020, SJW Group’s regulatory assets, net not earning a return primarily included postretirement pensions and other medical benefits unfunded amount, and the business combinations debt premium, net. The total amount of regulatory assets, net not earning a return at September 30, 2021, and December 31, 2020, either by interest on the regulatory asset/liability or as a component of rate base at the allowed rate of return was $121,090 and $119,236, respectively.

Balancing and Memorandum Accounts

9 Months Ended

Sep. 30, 2021

Regulated Operations [Abstract]

Balancing and Memorandum Accounts

Balancing and Memorandum AccountsSJWC has established balancing accounts for the purpose of tracking the under-collection or over-collection associated with expense changes and revenue authorized by the CPUC to offset those expense changes. SJWC also maintains memorandum accounts to track revenue impacts due to catastrophic events, certain unforeseen water quality expenses related to new federal and state water quality standards, energy efficiency, water conservation, water tariffs, and other approved activities or as directed by the CPUC. The Monterey Water Revenue Adjustment Mechanism (“MWRAM”) tracks the difference between the revenue received for actual metered sales through the tiered volumetric rate and the revenue that would have been received with the same actual metered sales if a uniform rate would have been in effect.

Balancing and memorandum accounts recorded to regulatory assets, net for the three and nine months ended September 30, 2021, and 2020 as follows:


	Three months ended September 30, 2021				Three months ended September 30, 2020
	Beginning Balance		Regulatory Asset Increase (Decrease)	Refunds (Collections) Adjustments	Ending Balance	Beginning Balance		Regulatory Asset Increase (Decrease)	Refunds (Collections) Adjustments	Ending Balance
Revenue accounts:
MWRAM	$	15,278	363	—	15,641	$	10,549	(1,124)	2,625	12,050


Cost of capital memorandum account	(1,562)		—	—	(1,562)	(1,560)		(1)	—	(1,561)
Tax memorandum account	333		—	—	333	332		1	—	333
All others	(829)		397	—	(432)	(1,034)		37	1	(996)
Total revenue accounts	$	13,220	760	—	13,980	$	8,287	(1,087)	2,626	9,826
Cost-recovery accounts:
Water supply costs	9,895		388	—	10,283	5,899		1,222	1	7,122
Pension	4,210		366	—	4,576	2,985		(253)	—	2,732
Hydro Generation Research, Development and Demonstration Memorandum Account (“PRVMA”)	928		—	(121)	807	—		1,219	(8)	1,211
COVID-19 Catastrophic Event Memorandum Account (“CEMA”)	2,618		567	—	3,185	—		—	—	—
All others	446		—	—	446	444		—	—	444
Total cost-recovery accounts	$	18,097	1,321	(121)	19,297	$	9,328	2,188	(7)	11,509

Total	$	31,317	2,081	(121)	33,277	$	17,615	1,101	2,619	21,335


	Nine months ended September 30, 2021				Nine months ended September 30, 2020
	Beginning Balance		Regulatory Asset Increase (Decrease)	Refunds (Collections) Adjustments	Ending Balance	Beginning Balance		Regulatory Asset Increase (Decrease)	Refunds (Collections) Adjustments	Ending Balance
Revenue accounts:
MWRAM	$	12,077	3,563	1	15,641	$	7,015	2,437	2,598	12,050


Cost of capital memorandum account	(1,561)		(1)	—	(1,562)	(1,553)		(8)	—	(1,561)
Tax memorandum account	333		—	—	333	(6,643)		(2)	6,978	333
All others	(806)		369	5	(432)	(759)		(128)	(109)	(996)
Total revenue accounts	$	10,043	3,931	6	13,980	$	(1,940)	2,299	9,467	9,826
Cost-recovery accounts:
Water supply costs	8,123		2,159	1	10,283	4,328		2,827	(33)	7,122
Pension	3,478		1,098	—	4,576	2,449		261	22	2,732
PRVMA	1,108		—	(301)	807	—		1,219	(8)	1,211
CEMA	2,266		919	—	3,185	—		—	—	—
All others	445		1	—	446	446		2	(4)	444
Total cost-recovery accounts	$	15,420	4,177	(300)	19,297	$	7,223	4,309	(23)	11,509

Total	$	25,463	8,108	(294)	33,277	$	5,283	6,608	9,444	21,335

All balancing accounts and memorandum-type accounts not included for recovery or refund in the current general rate case will be reviewed by the CPUC in SJWC’s next general rate case or at the time an individual account balance reaches a threshold of 2% of authorized revenue, whichever occurs first.

Capitalization	9 Months Ended
Capitalization	Sep. 30, 2021
Equity [Abstract]
Capitalization	Capitalization On March 8, 2021, SJW Group entered into an underwriting agreement with J.P. Morgan Securities LLC, as the representative of the several underwriters named therein (the “Underwriters”), which provided for the issuance and sale by SJW Group to the Underwriters 1,030,000 shares of our common stock, par value $0.001 per share, in an underwritten public offering (the “Offering”). The shares in the Offering were sold at a public offering price of $59.00 per share. SJW Group also granted the Underwriters an option to purchase up to 154,500 additional shares of common stock, which was exercised in full. The Offering closed on March 11, 2021, and the offering of option shares closed on March 16, 2021. SJW Group received net proceeds of approximately $66,775 from the Offering and the sale of option shares, after deducting the underwriting discounts and commissions and offering expenses. SJW Group used the proceeds from the offerings to pay down a bank line of credit agreement, dated as of June 1, 2016, between SJWC and JPMorgan Chase Bank, N.A. and for general corporate purposes, which included, among other things, financing infrastructure improvements and other capital expenditures, repayment of debt or other corporate obligations and working capital.

- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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-Subparagraph (SX 210.3-04)
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Reference 14: http://www.xbrl.org/2003/role/disclosureRef
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Reference 15: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Equity Plans

9 Months Ended

Sep. 30, 2021

Share-based Payment Arrangement [Abstract]

Equity Plans

The Incentive Plan allows SJW Group to provide employees, non-employee board members or the board of directors of any parent or subsidiary, consultants, and other independent advisors who provide services to the company or any parent or subsidiary the opportunity to acquire an equity interest in SJW Group. As of September 30, 2021, 174,154 shares are issuable upon the vesting of outstanding restricted stock units and deferred restricted stock units and an additional 685,660 shares are available for award issuances under the Incentive Plan.

In connection with the merger with CTWS on October 9, 2019, SJW Group assumed outstanding awards of restricted stock units and deferred share units under the following stock plans: the CTWS 2014 Performance Stock Program, the CTWS 2004 Performance Stock Program and the CTWS 1994 Performance Stock Program (collectively, the “CTWS Plans”). As of September 30, 2021, approximately 56,326 shares are issuable upon the exercise of outstanding restricted stock units and deferred restricted stock units under the CTWS Plans.

A summary of compensation costs charged to income and proceeds from the exercise of any restricted stock and similar instruments that are recorded to additional paid-in capital and common stock, by award type, are presented below for the three and nine months ended September 30, 2021, and 2020:


	Three months ended September 30,			Nine months ended September 30,
	2021		2020	2021		2020
Compensation costs charged to income:
ESPP	$	176	152	$	357	323
Restricted stock and deferred restricted stock	954		906	2,844		1,995
Total compensation costs charged to income	$	1,130	1,058	$	3,201	2,318
ESPP proceeds	$	1,000	860	$	2,026	1,830

Restricted Stock and Deferred Restricted Stock

For the three months ended September 30, 2021, and 2020, SJW Group granted under the Incentive Plan 1,134 and 761, respectively, one year and three year service-based restricted stock awards with a weighted-average grant date fair value of $69.20 and $58.63, respectively, per unit. For the nine months ended September 30, 2021, and 2020, SJW Group granted under the Incentive Plan 46,567 and 43,474, respectively, one year and three year service-based restricted stock awards with a weighted-average grant date fair value of $64.65 and $63.87, respectively, per unit.

For the three months ended September 30, 2021, and 2020, SJW Group granted under the Incentive Plan 0 and 58 target units, respectively, performance-based and market-based restricted stock awards with a weighted-average grant date fair value of $0.00 and $62.95, respectively, per unit. For the nine months ended September 30, 2021, and 2020, SJW Group granted under

the Incentive Plan 30,641 and 24,777 target units, respectively, performance-based and market-based restricted stock awards granted with a weighted-average grant date fair value of $66.33 and $65.02, respectively, per unit. Based upon actual attainment relative to the target performance metric, the number of shares issuable can range between 0% to 150% of the target number of shares for performance-based restricted stock awards, or between 0% and 200% of the target number of shares for market-based restricted stock awards.

As of September 30, 2021, the total unrecognized compensation costs related to restricted and deferred restricted stock plans amounted to $5,442. This cost is expected to be recognized over a weighted-average period of 1.72 years.

Employee Stock Purchase Plan

SJW Group’s recorded expenses were $91 and $265 for the three and nine months ended September 30, 2021, respectively, and $85 and $244 for the three and nine months ended September 30, 2020, respectively, related to the ESPP. The total unrecognized compensation costs related to the semi-annual offering period that ends January 31, 2022, for the ESPP is approximately $124. This cost is expected to be recognized during the fourth quarter of 2021 and first quarter of 2022.

Bank Borrowings and Long-Term Liabilities	9 Months Ended
Bank Borrowings and Long-Term Liabilities	Sep. 30, 2021
Long-Term Liabilities and Bank Borrowings [Abstract]
Bank Borrowings and Long-Term Liabilities	Bank Borrowings and Long-Term Liabilities SJW Group’s contractual obligations and commitments include senior notes, bank term loans, revenue bonds, state revolving fund loans and other obligations. Water Utility Services have received advance deposit payments from its customers on certain construction projects and the refunds of the advance deposit payments constitute an obligation of the respective subsidiaries. Lines of Credit On April 23, 2021, SJWC closed its $140,000 line of credit agreement which was set to mature on June 1, 2021, and entered into a new $140,000 credit agreement (“SJWC Credit Agreement”) with JPMorgan Chase Bank, N.A., as the lender (the “Lender”). The SJWC Credit Agreement provides an unsecured credit facility with a letter of credit sublimit of $15,000. Proceeds of borrowings under the SJWC Credit Agreement may be used to refinance existing debt, for working capital, and for general corporate purposes. The new SJWC Credit Agreement has a maturity date of December 31, 2023. The line of credit bears interest at variable rates. The SJWC Credit Agreement contains customary representations, warranties and events of default, as well as restrictive covenants customary for facilities of this type. The SJWC Credit Agreement also includes certain customary financial covenants such as a funded debt to capitalization ratio. Also on April 23, 2021, SJW Group, as guarantor, and CLWSC closed its $5,000 line of credit agreement which was set to mature on June 1, 2021, and entered into a new $5,000 credit agreement (“SJWTX Credit Agreement”) with the Lender. The SJWTX Credit Agreement provides an unsecured credit facility with a letter of credit sublimit of $1,000. The new SJWTX Credit Agreement has a maturity date of December 31, 2023. Long-Term Debt On March 2, 2021, Maine Water entered into a credit agreement with a commercial bank, pursuant to an existing master loan agreement under which the commercial bank issued Maine Water a promissory note on the same date with an aggregate principal amount of $17,000 and a fixed interest rate of 3.89%, due March 1, 2041. The notes are unsecured obligations of Maine Water. Interest is payable quarterly in arrears on the 20th day of January, April, July and October of each year. The promissory note contains customary representations and warranties. Under the promissory note, Maine Water is required to comply with certain customary affirmative and negative covenants for as long as the notes are outstanding. The notes are also subject to customary events of default, the occurrence of which may result in all of the notes then outstanding becoming immediately due and payable. Proceeds from the borrowing were received on March 18, 2021. On May 13, 2021, CLWSC entered into a master credit agreement and promissory note with a commercial bank under which it entered into a borrowing agreement for an aggregate principal amount not to exceed $30,000, of which $20,000 was advanced at the closing date. The borrowing carries a fixed interest rate of 4.01% due on March 20, 2041. The remaining aggregate principal amount of the promissory note is to be advanced at the discretion of CLWSC before the maturity date. The notes are unsecured obligations of CLWSC. Interest is payable quarterly in arrears on the 20th day of January, April, July and October of each year. The promissory note contains customary representations and warranties. Under the promissory note, CLWSC is required to comply with certain customary affirmative and negative covenants for as long as the notes are outstanding. The notes are also subject to customary events of default, the occurrence of which may result in all of the notes then outstanding becoming immediately due and payable. On June 25, 2021, SJWC entered into a note purchase agreement with certain affiliates of New York Life Insurance (collectively the “Purchasers”), pursuant to which the company sold an aggregate principal amount of $50,000 of its 3.00% Senior Notes, Series N (“Series N Notes”) to the Purchasers. The Series N Notes are unsecured obligations of SJWC and are due on June 25, 2051. Interest is payable semi-annually in arrears on January 1st and July 1st of each year. The note purchase agreement contains customary affirmative and negative covenants for as long as the Series N Notes are outstanding. The Series N Notes are also subject to customary events of default, the occurrence of which may result in all of the Series N Notes then outstanding becoming immediately due and payable. The closing occurred simultaneously with the signing of the note purchase agreement. On August 4, 2021, Connecticut Water entered into a note purchase agreement with certain affiliates of Metropolitan Life Insurance Company, New York Life Insurance Company, the Northwestern Mutual Life Insurance Company and Pacific Life Insurance Company, pursuant to which Connecticut Water sold on August 4, 2021, an aggregate principal amount of $50,000 of its 3.07% Senior Notes, Series 2021A, due 2051 (the “2021A Notes”) and will sell on December 1, 2021, an aggregate principal amount of $50,000 of its 3.10% Senior Notes, Series 2021B, due 2051 (the “2021B Notes” and together with the 2021A Notes, the “CWC Notes”). The closing on December 1, 2021, is subject to customary closing conditions. The CWC Notes are unsecured obligations of Connecticut Water, with the 2021A Notes due on June 1, 2051, and the 2021B Notes due on December 1, 2051. Interest on the CWC Notes is payable semi-annually in arrears on June 1st and December 1st of each year. The note purchase agreement contains customary representations and warranties. Connecticut Water has agreed to customary affirmative and negative covenants for as long as the CWC Notes are outstanding. The CWC Notes are also subject to customary events of default, the occurrence of which may result in all of the CWC Notes then outstanding becoming immediately due and payable. The proceeds from the sale of the CWC Notes will be used to repay outstanding short and/or long-term borrowings, to fund Connecticut Water’s capital expenditures, and/or for other general corporate purposes. On August 4, 2021, SJWC entered into a note purchase agreement with the purchasers listed in the agreement, pursuant to which the company sold an aggregate principal amount of $50,000 of its 3.00% Senior Notes, Series O (“Series O Notes”), due December 1, 2051. The Series O Notes are unsecured obligations of SJWC. Interest is payable semi-annually in arrears on June 1st and December 1st of each year. The note purchase agreement contains customary affirmative and negative covenants for as long as the Series O Notes are outstanding. The Series O Notes are also subject to customary events of default, the occurrence of which may result in all of the Series O Notes then outstanding becoming immediately due and payable. The closing of the note purchase agreement is expected to occur on December 1, 2021.

Benefit Plans

9 Months Ended

Sep. 30, 2021

Retirement Benefits [Abstract]

Benefit Plans

SJW Group maintains noncontributory defined benefit pension plans for its eligible employees. SJWC and CTWS employees hired before March 31, 2008, and January 1, 2009, respectively, are entitled to benefits under the pension plans based on the employee’s years of service and compensation. For SJWC employees, hired on or after March 31, 2008, benefits are determined using a cash balance formula based upon compensation credits and interest credits for each employee. Certain CTWS employees hired before March 1, 2012, and covered by a plan merged into the CTWS plan in 2013 are also entitled to benefits based on the employee’s years of service and compensation. CTWS employees hired on or after January 1, 2009, are entitled to an additional 1.5% of eligible compensation to their company sponsored savings plan. SJW Group does not have multi-employer plans.

In addition, senior management hired before March 31, 2008, for SJWC and January 1, 2009, for CTWS are eligible to receive additional retirement benefits under supplemental executive retirement plans and retirement contracts. SJWC’s senior management hired on or after March 31, 2008, are eligible to receive additional retirement benefits under SJWC’s Cash Balance Executive Supplemental Retirement Plan. The supplemental retirement plans and Cash Balance Executive Supplemental Retirement Plan are non-qualified plans in which only senior management and other designated members of management may participate. SJW Group also provides health care and life insurance benefits for retired employees under employer-sponsored postretirement benefits other than pension plans.

The components of net periodic benefit costs for the defined benefit plans and other postretirement benefits for the three and nine months ended September 30, 2021, and 2020 are as follows:


	Three months ended September 30,			Nine months ended September 30,
	2021		2020	2021		2020
Service cost	$	2,711	2,390	$	8,134	7,170
Interest cost	2,556		2,860	7,666		8,580
Expected return on assets	(4,748)		(4,126)	(14,242)		(12,429)
Unrecognized actuarial loss	1,788		1,296	5,362		3,888
Amortization of prior service cost	12		39	37		115
Total	$	2,319	2,459	$	6,957	7,324

In 2021, SJW Group expects to make required and discretionary cash contributions of up to $9,043 to the pension plans and other postretirement benefits. For the three and nine months ended September 30, 2021, SJW Group has made $3,517 and $4,997, respectively, contributions to such plans.

- Definition

The entire disclosure for retirement benefits.

+ References

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+ Details

Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For the three and nine months ended September 30, 2021, income tax expense was $2,749 and $5,159, respectively. Income tax expense for the three and nine months ended September 30, 2020, was $4,578 and $9,226, respectively. The effective consolidated income tax rates were 13% and 15% for the three months ended September 30, 2021 and 2020, respectively, and 11% and 16% for the nine months ended September 30, 2021, and 2020, respectively. The lower effective rates for the three and nine months ended September 30, 2021, were primarily due to flow-through tax benefits. SJW Group had unrecognized tax benefits, before the impact of deductions of state taxes, excluding interest and penalties of approximately $7,537 and $6,468 as of September 30, 2021, and December 31, 2020, respectively. SJW Group does not expect its unrecognized tax benefits to change significantly within the next 12 months. On March 11, 2021, the American Rescue Plan Act (the “Act”) was signed into law. SJW Group has considered the income tax implications of the Act in its estimated tax provision and does not believe it will materially impact the company’s year-end tax rate.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Fair Value Measurement	9 Months Ended
Fair Value Measurement	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurement	Fair Value Measurement The following instruments are not measured at fair value on SJW Group’s condensed consolidated balance sheets as of September 30, 2021, but require disclosure of their fair values: cash and cash equivalents, accounts receivable and accounts payable. The estimated fair value of such instruments as of September 30, 2021, approximates their carrying value as reported on the condensed consolidated balance sheets. The estimated fair value of such financial instruments are determined using the income approach based on the present value of estimated future cash flows. There have been no changes in valuation techniques during the three and nine months ended September 30, 2021. The fair value of these instruments would be categorized as Level 2 in the fair value hierarchy, with the exception of cash and cash equivalents, which would be categorized as Level 1. The fair value of SJW Group’s long-term debt was approximately $1,573,581 and $1,570,727 as of September 30, 2021, and December 31, 2020, respectively, and was determined using a discounted cash flow analysis, based on the current rates for similar financial instruments of the same duration and creditworthiness of the company. The book value of long-term debt was $1,446,320 and $1,363,821 as of September 30, 2021, and December 31, 2020, respectively. The fair value of long-term debt would be categorized as Level 2 in the fair value hierarchy. CTWS’s additional retirement benefits under the supplemental executive retirement plans and retirement contracts are funded by investment assets held by a Rabbi Trust. The fair value of the money market funds, mutual funds and fixed income investments in the Rabbi Trust was $3,738 and $3,014 as of September 30, 2021, and December 31, 2020, respectively, and are categorized as Level 1 in the fair value hierarchy.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Segment and Non-Tariffed Business Reporting

9 Months Ended

Sep. 30, 2021

Segment Reporting [Abstract]

Segment and Non-Tariffed Business Reporting

SJW Group is a holding company with four subsidiaries: (i) SJWC, a water utility operation with both regulated and non-tariffed businesses, (ii) CLWSC, a regulated water utility located in Canyon Lake, Texas, and its consolidated non-tariffed variable interest entity, Acequia Water Supply Corporation, (iii) SJW Land Company and its consolidated variable interest entity, 444 West Santa Clara Street, L.P., which operated commercial building rentals, and (iv) SJWNE LLC a holding company for CTWS and its subsidiaries, Connecticut Water, Maine Water, New England Water Utility Services, Inc. (“NEWUS”) and Chester Realty, Inc. In accordance with FASB ASC Topic 280 - “Segment Reporting,” SJW Group’s reportable segments have been determined based on information used by the chief operating decision maker. SJW Group’s chief operating decision maker includes the Chairman, President and Chief Executive Officer, and his executive staff. The first segment is providing water utility and utility-related services to its customers through SJW Group’s subsidiaries, SJWC, Connecticut Water, CLWSC, Maine Water, and NEWUS together referred to as “Water Utility Services.” The second segment is property management and investment activity conducted by SJW Land Company and Chester Realty, Inc., referred to as “Real Estate Services.”

The following tables set forth information relating to SJW Group’s reportable segments and distribution of regulated and non-tariffed business activities within the reportable segments. Certain allocated assets, such as goodwill, revenue and expenses have been included in the reportable segment amounts. Other business activity of SJW Group not included in the reportable segments is included in the “All Other” category.


	For Three Months Ended September 30, 2021
	Water Utility Services			Real Estate Services	All Other (1)	SJW Group
	Regulated		Non-tariffed	Non-tariffed	Non-tariffed	Regulated	Non-tariffed	Total
Operating revenue	$	162,352	3,168	1,403	—	162,352	4,571	166,923
Operating expense	129,915		2,156	956	122	129,915	3,234	133,149
Operating income (loss)	32,437		1,012	447	(122)	32,437	1,337	33,774
Net income (loss)	20,625		879	294	(2,730)	20,625	(1,557)	19,068
Depreciation and amortization	23,209		113	292	223	23,209	628	23,837
Interest on long-term debt and other interest expense	8,805		—	—	4,730	8,805	4,730	13,535
Provision (benefit) for income taxes	3,537		280	100	(1,168)	3,537	(788)	2,749
Assets	$	3,352,976	7,141	44,629	64,995	3,352,976	116,765	3,469,741


	For Three Months Ended September 30, 2020
	Water Utility Services			Real Estate Services	All Other (1)	SJW Group
	Regulated		Non-tariffed	Non-tariffed	Non-tariffed	Regulated	Non-tariffed	Total
Operating revenue	$	161,646	2,814	1,403	—	161,646	4,217	165,863
Operating expense	119,885		2,161	961	973	119,885	4,095	123,980
Operating income (loss)	41,761		653	442	(973)	41,761	122	41,883
Net income (loss)	25,053		827	310	(97)	25,053	1,040	26,093
Depreciation and amortization	21,782		116	296	223	21,782	635	22,417
Interest on long-term debt and other interest expense	8,112		—	—	5,062	8,112	5,062	13,174
Provision (benefit) for income taxes	9,450		179	105	(5,156)	9,450	(4,872)	4,578
Assets	$	3,131,778	8,589	45,980	73,367	3,131,778	127,936	3,259,714


	For Nine Months Ended September 30, 2021
	Water Utility Services			Real Estate Services	All Other (1)	SJW Group
	Regulated		Non-tariffed	Non-tariffed	Non-tariffed	Regulated	Non-tariffed	Total
Operating revenue	$	421,985	7,897	4,067	—	421,985	11,964	433,949
Operating expense	343,965		5,467	2,718	2,307	343,965	10,492	354,457
Operating income (loss)	78,020		2,430	1,349	(2,307)	78,020	1,472	79,492
Net income (loss)	46,909		2,278	913	(7,641)	46,909	(4,450)	42,459
Depreciation and amortization	68,913		332	872	670	68,913	1,874	70,787
Interest on long-term debt and other interest expense	25,323		—	—	15,332	25,323	15,332	40,655
Provision (benefit) for income taxes	8,001		665	305	(3,812)	8,001	(2,842)	5,159
Assets	$	3,352,976	7,141	44,629	64,995	3,352,976	116,765	3,469,741


	For Nine Months Ended September 30, 2020
	Water Utility Services			Real Estate Services	All Other (1)	SJW Group
	Regulated		Non-tariffed	Non-tariffed	Non-tariffed	Regulated	Non-tariffed	Total
Operating revenue	$	416,085	8,524	4,217	—	416,085	12,741	428,826
Operating expense	323,087		5,281	2,642	4,436	323,087	12,359	335,446
Operating income (loss)	92,998		3,243	1,575	(4,436)	92,998	382	93,380
Net income (loss)	53,117		3,178	1,141	(9,205)	53,117	(4,886)	48,231
Depreciation and amortization	64,654		332	896	670	64,654	1,898	66,552
Interest on long-term debt and other interest expense	24,575		—	—	15,063	24,575	15,063	39,638
Provision (benefit) for income taxes	16,101		909	361	(8,145)	16,101	(6,875)	9,226
Assets	$	3,131,778	8,589	45,980	73,367	3,131,778	127,936	3,259,714

____________________

(1) The “All Other” category for the nine months ended September 30, 2021 and September 30, 2020, includes the accounts of SJW Group, SJWNE LLC and CTWS on a stand-alone basis.

(2) As of September 30, 2021 and December 31, 2020, the Company has performed an allocation of goodwill associated with the acquisition of CTWS to two reporting units, Connecticut and Maine, which are both aggregated within the Regulated Water Utility Services reportable segment.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

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+ Details

Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and ContingenciesSJW Group is subject to ordinary routine litigation incidental to its business. There are no pending legal proceedings to which SJW Group or any of its subsidiaries is a party, or to which any of its properties is the subject, that are expected to have a material effect on SJW Group’s business, financial position, results of operations or cash flows.

Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2021
Statement of Financial Position [Abstract]
Subsequent Events	Subsequent EventsOn October 29, 2021, San Jose Water sold two non-utility properties located in San Jose, California for $13,150. Also, on the same date, SJW Land sold undeveloped land located in San Jose, California for $2,600. SJW Group will record an estimated pre-tax gain on the sale of real estate investments of $13,600 in the fourth quarter of 2021.

General (Policies)	9 Months Ended
General (Policies)	Sep. 30, 2021
Accounting Policies [Abstract]
Basis of Accounting	The unaudited interim financial information has been prepared in accordance with accounting principles generally accepted in the United States of America and in accordance with the instructions for Form 10-Q and Rule 10-01 of Regulation S-X promulgated by the Securities and Exchange Commission. The Notes to Consolidated Financial Statements in SJW Group’s 2020 Annual Report on Form 10-K should be read with the accompanying unaudited condensed consolidated financial statements.
Recently Adopted Accounting Principles	Recently Adopted Accounting Principles In December 2019, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2019-12, “Simplifying the Accounting for Income Taxes”, which simplifies the accounting for income taxes, eliminates certain exceptions within Topic 740, “Income Taxes”, and clarifies certain aspects of the current guidance to promote consistency among reporting entities. ASU 2019-12 was effective for SJW Group in the first quarter of fiscal 2021. The adoption of ASU 2019-12 did not have a material impact on the consolidated financial statements.
Revenue	Revenue Water sales are seasonal in nature and influenced by weather conditions. The timing of precipitation and climatic conditions can cause seasonal water consumption by customers to vary significantly. Due to the seasonal nature of the water business, the operating results for interim periods are not indicative of the operating results for a 12-month period. Revenue is generally higher in the warm, dry summer months when water usage and sales are greater, and lower in the winter months when cooler temperatures and increased precipitation curtail water usage resulting in lower sales.
Earnings per Share	Earnings per ShareBasic earnings per share is calculated using income available to common stockholders, divided by the weighted average number of shares outstanding during the period. Diluted earnings per share is calculated using income available to common stockholders divided by the weighted average number of shares of common stock including both shares outstanding and shares potentially issuable in connection with restricted common stock awards under SJW Group’s Long-Term Incentive Plan (as amended, the “Incentive Plan”), shares potentially issuable under the performance stock plans assumed through the business combination with Connecticut Water Service, Inc. (“CTWS”), and shares potentially issuable under the Employee Stock Purchase Plan (“ESPP”).

General (Tables)

9 Months Ended

Sep. 30, 2021

Accounting Policies [Abstract]

Major Streams of Revenue

The major streams of revenue for SJW Group are as follows:


	Three months ended September 30,			Nine months ended September 30,
	2021		2020	2021		2020
Revenue from contracts with customers	$	163,103	167,045	$	422,545	414,344
Alternative revenue programs, net	2,216		1,324	4,984		4,877
Other balancing and memorandum accounts, net	639		1,532	3,637		11,743
Other regulatory mechanisms, net	(438)		(5,441)	(1,284)		(6,355)
Rental income	1,403		1,403	4,067		4,217
	$	166,923	165,863	$	433,949	428,826

Schedule of Real Estate Investments

The major components of real estate investments as of September 30, 2021, and December 31, 2020, are as follows:


	September 30, 2021		December 31, 2020
Land	$	14,168	14,168
Buildings and improvements	44,597		43,961

Subtotal	58,765		58,129
Less: accumulated depreciation and amortization	15,655		14,783
Total	$	43,110	43,346

Regulatory Assets, Net (Tables)

9 Months Ended

Sep. 30, 2021

Regulatory Assets and Liabilities Disclosure [Abstract]

Schedule of Regulatory Assets, Net

Regulatory assets, net are comprised of the following as of September 30, 2021, and December 31, 2020:


	September 30, 2021		December 31, 2020
Regulatory assets:
Income tax temporary differences, net	$	15,772	6,230
Postretirement pensions and other medical benefits	99,213		95,559
Business combinations debt premium, net	20,573		22,479
Balancing and memorandum accounts, net	33,277		25,463
Water Rate Adjustment	5,489		323
Other, net	7,786		8,176
Total regulatory assets, net in Condensed Consolidated Balance Sheets	182,110		158,230
Less: current regulatory assets, net	3,249		1,748
Total regulatory assets, net, less current portion	$	178,861	156,482

Balancing and Memorandum Accounts (Tables)

9 Months Ended

Sep. 30, 2021

Regulated Operations [Abstract]

Public Utilities General Disclosures

Balancing and memorandum accounts recorded to regulatory assets, net for the three and nine months ended September 30, 2021, and 2020 as follows:


	Three months ended September 30, 2021				Three months ended September 30, 2020
	Beginning Balance		Regulatory Asset Increase (Decrease)	Refunds (Collections) Adjustments	Ending Balance	Beginning Balance		Regulatory Asset Increase (Decrease)	Refunds (Collections) Adjustments	Ending Balance
Revenue accounts:
MWRAM	$	15,278	363	—	15,641	$	10,549	(1,124)	2,625	12,050


Cost of capital memorandum account	(1,562)		—	—	(1,562)	(1,560)		(1)	—	(1,561)
Tax memorandum account	333		—	—	333	332		1	—	333
All others	(829)		397	—	(432)	(1,034)		37	1	(996)
Total revenue accounts	$	13,220	760	—	13,980	$	8,287	(1,087)	2,626	9,826
Cost-recovery accounts:
Water supply costs	9,895		388	—	10,283	5,899		1,222	1	7,122
Pension	4,210		366	—	4,576	2,985		(253)	—	2,732
Hydro Generation Research, Development and Demonstration Memorandum Account (“PRVMA”)	928		—	(121)	807	—		1,219	(8)	1,211
COVID-19 Catastrophic Event Memorandum Account (“CEMA”)	2,618		567	—	3,185	—		—	—	—
All others	446		—	—	446	444		—	—	444
Total cost-recovery accounts	$	18,097	1,321	(121)	19,297	$	9,328	2,188	(7)	11,509

Total	$	31,317	2,081	(121)	33,277	$	17,615	1,101	2,619	21,335


	Nine months ended September 30, 2021				Nine months ended September 30, 2020
	Beginning Balance		Regulatory Asset Increase (Decrease)	Refunds (Collections) Adjustments	Ending Balance	Beginning Balance		Regulatory Asset Increase (Decrease)	Refunds (Collections) Adjustments	Ending Balance
Revenue accounts:
MWRAM	$	12,077	3,563	1	15,641	$	7,015	2,437	2,598	12,050


Cost of capital memorandum account	(1,561)		(1)	—	(1,562)	(1,553)		(8)	—	(1,561)
Tax memorandum account	333		—	—	333	(6,643)		(2)	6,978	333
All others	(806)		369	5	(432)	(759)		(128)	(109)	(996)
Total revenue accounts	$	10,043	3,931	6	13,980	$	(1,940)	2,299	9,467	9,826
Cost-recovery accounts:
Water supply costs	8,123		2,159	1	10,283	4,328		2,827	(33)	7,122
Pension	3,478		1,098	—	4,576	2,449		261	22	2,732
PRVMA	1,108		—	(301)	807	—		1,219	(8)	1,211
CEMA	2,266		919	—	3,185	—		—	—	—
All others	445		1	—	446	446		2	(4)	444
Total cost-recovery accounts	$	15,420	4,177	(300)	19,297	$	7,223	4,309	(23)	11,509

Total	$	25,463	8,108	(294)	33,277	$	5,283	6,608	9,444	21,335

Equity Plans (Tables)

9 Months Ended

Sep. 30, 2021

Share-based Payment Arrangement [Abstract]

Schedule of Compensation Costs Charged to Income and Proceeds from the Exercise of Any Restricted Stock and Similar Instruments that are Recorded to Additional Paid-In Capital and Common Stock, by Award Type


	Three months ended September 30,			Nine months ended September 30,
	2021		2020	2021		2020
Compensation costs charged to income:
ESPP	$	176	152	$	357	323
Restricted stock and deferred restricted stock	954		906	2,844		1,995
Total compensation costs charged to income	$	1,130	1,058	$	3,201	2,318
ESPP proceeds	$	1,000	860	$	2,026	1,830

Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2021

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs

The components of net periodic benefit costs for the defined benefit plans and other postretirement benefits for the three and nine months ended September 30, 2021, and 2020 are as follows:


	Three months ended September 30,			Nine months ended September 30,
	2021		2020	2021		2020
Service cost	$	2,711	2,390	$	8,134	7,170
Interest cost	2,556		2,860	7,666		8,580
Expected return on assets	(4,748)		(4,126)	(14,242)		(12,429)
Unrecognized actuarial loss	1,788		1,296	5,362		3,888
Amortization of prior service cost	12		39	37		115
Total	$	2,319	2,459	$	6,957	7,324

Segment and Non-Tariffed Business Reporting (Tables)

9 Months Ended

Sep. 30, 2021

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment


	For Three Months Ended September 30, 2021
	Water Utility Services			Real Estate Services	All Other (1)	SJW Group
	Regulated		Non-tariffed	Non-tariffed	Non-tariffed	Regulated	Non-tariffed	Total
Operating revenue	$	162,352	3,168	1,403	—	162,352	4,571	166,923
Operating expense	129,915		2,156	956	122	129,915	3,234	133,149
Operating income (loss)	32,437		1,012	447	(122)	32,437	1,337	33,774
Net income (loss)	20,625		879	294	(2,730)	20,625	(1,557)	19,068
Depreciation and amortization	23,209		113	292	223	23,209	628	23,837
Interest on long-term debt and other interest expense	8,805		—	—	4,730	8,805	4,730	13,535
Provision (benefit) for income taxes	3,537		280	100	(1,168)	3,537	(788)	2,749
Assets	$	3,352,976	7,141	44,629	64,995	3,352,976	116,765	3,469,741


	For Three Months Ended September 30, 2020
	Water Utility Services			Real Estate Services	All Other (1)	SJW Group
	Regulated		Non-tariffed	Non-tariffed	Non-tariffed	Regulated	Non-tariffed	Total
Operating revenue	$	161,646	2,814	1,403	—	161,646	4,217	165,863
Operating expense	119,885		2,161	961	973	119,885	4,095	123,980
Operating income (loss)	41,761		653	442	(973)	41,761	122	41,883
Net income (loss)	25,053		827	310	(97)	25,053	1,040	26,093
Depreciation and amortization	21,782		116	296	223	21,782	635	22,417
Interest on long-term debt and other interest expense	8,112		—	—	5,062	8,112	5,062	13,174
Provision (benefit) for income taxes	9,450		179	105	(5,156)	9,450	(4,872)	4,578
Assets	$	3,131,778	8,589	45,980	73,367	3,131,778	127,936	3,259,714


	For Nine Months Ended September 30, 2021
	Water Utility Services			Real Estate Services	All Other (1)	SJW Group
	Regulated		Non-tariffed	Non-tariffed	Non-tariffed	Regulated	Non-tariffed	Total
Operating revenue	$	421,985	7,897	4,067	—	421,985	11,964	433,949
Operating expense	343,965		5,467	2,718	2,307	343,965	10,492	354,457
Operating income (loss)	78,020		2,430	1,349	(2,307)	78,020	1,472	79,492
Net income (loss)	46,909		2,278	913	(7,641)	46,909	(4,450)	42,459
Depreciation and amortization	68,913		332	872	670	68,913	1,874	70,787
Interest on long-term debt and other interest expense	25,323		—	—	15,332	25,323	15,332	40,655
Provision (benefit) for income taxes	8,001		665	305	(3,812)	8,001	(2,842)	5,159
Assets	$	3,352,976	7,141	44,629	64,995	3,352,976	116,765	3,469,741


	For Nine Months Ended September 30, 2020
	Water Utility Services			Real Estate Services	All Other (1)	SJW Group
	Regulated		Non-tariffed	Non-tariffed	Non-tariffed	Regulated	Non-tariffed	Total
Operating revenue	$	416,085	8,524	4,217	—	416,085	12,741	428,826
Operating expense	323,087		5,281	2,642	4,436	323,087	12,359	335,446
Operating income (loss)	92,998		3,243	1,575	(4,436)	92,998	382	93,380
Net income (loss)	53,117		3,178	1,141	(9,205)	53,117	(4,886)	48,231
Depreciation and amortization	64,654		332	896	670	64,654	1,898	66,552
Interest on long-term debt and other interest expense	24,575		—	—	15,063	24,575	15,063	39,638
Provision (benefit) for income taxes	16,101		909	361	(8,145)	16,101	(6,875)	9,226
Assets	$	3,131,778	8,589	45,980	73,367	3,131,778	127,936	3,259,714

____________________

(1) The “All Other” category for the nine months ended September 30, 2021 and September 30, 2020, includes the accounts of SJW Group, SJWNE LLC and CTWS on a stand-alone basis.

General - Major Streams of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Accounting Policies [Abstract]
Revenue from contracts with customers	$ 163,103	$ 167,045	$ 422,545	$ 414,344
Alternative revenue programs, net	2,216	1,324	4,984	4,877
Other balancing and memorandum accounts, net	639	1,532	3,637	11,743
Other regulatory mechanisms, net	(438)	(5,441)	(1,284)	(6,355)
Rental income	1,403	1,403	4,067	4,217
Total revenues	$ 166,923	$ 165,863	$ 433,949	$ 428,826

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(1))
-URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227

+ Details

General - Earnings per Share (Details) - shares	3 Months Ended		9 Months Ended
General - Earnings per Share (Details) - shares	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Restricted Stock Units (RSUs)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive restricted common stock units excluded from computation of earnings per share (in shares)	1,558	1,029	14,441	20,220

General - Real Estate Investments (Details) $ in Thousands			3 Months Ended		9 Months Ended
General - Real Estate Investments (Details) $ in Thousands	Jun. 29, 2021 USD ($)	Sep. 28, 2020 USD ($) property	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2017 USD ($)
Real Estate Properties [Line Items]
Land			$ 14,168		$ 14,168		$ 14,168
Buildings and improvements			44,597		44,597		43,961
Subtotal			58,765		58,765		58,129
Less accumulated depreciation and amortization			15,655		15,655		14,783
Real estate investments, net			43,110		43,110		$ 43,346
Sales agreement, holdback amount								$ 3,000
Gain on sale of real estate investments	$ 3,000		$ 0	$ 0	$ 3,000	$ 0
San Jose Water Company
Real Estate Properties [Line Items]
Gain on sale of real estate investments		$ 1,048
Number of properties sold \| property		6
Proceeds from sale of real estate held-for-investment		$ 1,075
Real estate selling expenses		$ 22

Regulatory Rate Filings (Details)					1 Months Ended	3 Months Ended
Regulatory Rate Filings (Details)	Oct. 26, 2021 USD ($)	Nov. 23, 2020 USD ($)	Oct. 28, 2020 USD ($)	Jun. 17, 2020 USD ($)	Jan. 31, 2022 USD ($)	Jun. 30, 2022 USD ($)	Oct. 25, 2021 USD ($)	Sep. 08, 2021 USD ($)	Aug. 18, 2021	Aug. 11, 2021 USD ($)	Jul. 28, 2021 USD ($)	Jul. 27, 2021	Jun. 28, 2021 serviceConnection	Jun. 23, 2021	May 27, 2021 USD ($)	May 03, 2021 USD ($)	Mar. 16, 2021 USD ($)	Mar. 10, 2021 USD ($)	Mar. 03, 2021	Mar. 01, 2021 USD ($)	Feb. 25, 2021 USD ($)	Feb. 01, 2021	Jan. 29, 2021 USD ($)	Jan. 15, 2021 USD ($)	Jan. 04, 2021 USD ($)	Dec. 01, 2020 USD ($)	Nov. 16, 2020 USD ($)
San Jose Water Company \| General Rate Case No. 21-01-003
Public Utilities, General Disclosures [Line Items]
Regulatory rate filings, requested rate increase, year one																									$ 51,585,000		$ 11,750,000
Regulatory rate filings, requested rate increase as percentage of total revenue at time of request, year one																									13.35%		3.04%
Regulatory rate filings, requested rate increase, year two																									$ 16,932,000
Regulatory rate filings, proposed rate increase, percent of authorized revenue, year two																									3.88%
Regulatory rate filings, requested rate increase, year three																									$ 19,195,000
Regulatory rate filings, requested rate increase, percent of authorized revenue, year three																									4.24%
Regulatory rate filings, balancing and memorandum account, requested recovery (refund)																									$ 18,499,000
Regulatory rate filings, requested authorization for capital budget, amount																									$ 435,000,000
San Jose Water Company \| General Rate Case No. 21-05-004
Public Utilities, General Disclosures [Line Items]
Regulatory rate filings, requested rate increase, year one																$ 6,418,000
Regulatory rate filings, requested rate increase as percentage of total revenue at time of request, year one																1.61%
Regulatory rate filings, rate of return, requested																8.11%
Regulatory rate filings, rate of return, current																7.64%
Regulatory rate filings, average cost of debt rate, requested																6.20%
Regulatory rate filings, average cost of debt rate, current																5.48%
Regulatory rate filings, return of equity rate, requested																10.30%
Regulatory rate filings, return of equity rate, current																8.90%
Regulatory rate filings, capital structure, debt percentage, current																47.00%
Regulatory rate filings, capital structure, equity percentage, current																53.00%
Regulatory rate filings, capital structure, debt percentage, requested																45.00%
Regulatory rate filings, capital structure, equity percentage, requested																55.00%
San Jose Water Company \| Advice Letter No. 561/561A
Public Utilities, General Disclosures [Line Items]
Regulatory rate filings, requested rate increase, year one															$ 17,262,000
Regulatory rate filings, requested rate increase as percentage of total revenue at time of request, year one															4.34%
Connecticut Water
Public Utilities, General Disclosures [Line Items]
Public utilities, requested rate increase (decrease), amount			$ 956,000
Requested WICA surcharge, percentage			6.94%																7.03%
WICA surcharge, percentage											0.00%
Authorized WICA surcharge, percentage												7.03%
Regulatory rate filings, requested increase in revenues										$ 2,229,000														$ 20,206,000
Requested increase in revenues, completed infrastructure investments not currently in approved rates and surcharges																								$ 265,514,000
Regulatory rate filings, approved revenue increase											$ 5,208,000
Regulatory rate filings, return of equity rate, approved											9.00%
Regulatory rate filings, statutory cap reset value											$ 0
Connecticut Water \| Maximum
Public Utilities, General Disclosures [Line Items]
Regulatory rate filings, requested authorization for debt issuance																	$ 100,000,000
Connecticut Water \| Forecast
Public Utilities, General Disclosures [Line Items]
Public utilities, requested rate increase (decrease), amount					$ 2,581,000
Requested WICA surcharge, percentage					2.49%
Connecticut Water \| Subsequent Event
Public Utilities, General Disclosures [Line Items]
Public utilities, requested rate increase (decrease), amount	$ 21,746,000
Regulatory rate filings, approved revenue increase							$ 1,752,000
Connecticut Water \| WICA
Public Utilities, General Disclosures [Line Items]
Requested WICA surcharge increase (decrease), percentage			1.11%																			0.09%
Avon Water Company
Public Utilities, General Disclosures [Line Items]
Authorized WICA surcharge, percentage												8.51%
CLWSC
Public Utilities, General Disclosures [Line Items]
Authorized regulatory surcharge, per thousand gallons																				$ 0.70	$ 1.84		$ 0.95			$ 2.02
Authorized regulatory surcharge, percent increase									13.00%
Authorized regulatory base charge, per residential account																					$ 0.51
Potential increase in number of service connections \| serviceConnection													1,400
Maine Water Company
Public Utilities, General Disclosures [Line Items]
Regulatory rate filings, requested rate increase, year one								$ 6,880,000										$ 6,659,000
Regulatory rate filings, requested rate increase as percentage of total revenue at time of request, year one								80.10%										77.50%
Public utilities, requested rate increase (decrease), amount		$ 304,000
Approved rate increase (decrease)				$ 198,000
Approved rate increase (decrease), step increase 1				9.80%
Approved rate increase (decrease), step increase 2				3.51%
Approved rate increase (decrease)				13.31%
Authorized temporary surcharge, percentage														22.65%
Authorized temporary surcharge, period effective														1 year
Maine Water Company \| Maximum
Public Utilities, General Disclosures [Line Items]
Requested WISC surcharge increase (decrease), percentage		5.00%
Maine Water Company \| Minimum
Public Utilities, General Disclosures [Line Items]
Requested WISC surcharge increase (decrease), percentage		1.10%
Maine Water Company \| Forecast
Public Utilities, General Disclosures [Line Items]
Regulatory rate filings, requested project replacement value						$ 60,000,000

Regulatory Assets, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Regulatory Assets [Line Items]
Regulatory assets	$ 182,110	$ 158,230
Less: current regulatory assets, net	3,249	1,748
Total regulatory assets, net, less current portion	178,861	156,482
Regulatory assets, net not earning a return	121,090	119,236
Income tax temporary differences
Regulatory Assets [Line Items]
Regulatory assets	15,772	6,230
Postretirement pensions and other medical benefits
Regulatory Assets [Line Items]
Regulatory assets	99,213	95,559
Business combinations debt premium, net
Regulatory Assets [Line Items]
Regulatory assets	20,573	22,479
Balancing and memorandum accounts, net
Regulatory Assets [Line Items]
Regulatory assets	33,277	25,463
Water Rate Adjustment
Regulatory Assets [Line Items]
Regulatory assets	5,489	323
Other, net
Regulatory Assets [Line Items]
Regulatory assets	$ 7,786	$ 8,176

Balancing and Memorandum Accounts - Public Utilities General Disclosures (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue accounts:
Beginning Balance	$ 13,220	$ 8,287	$ 10,043	$ (1,940)
Regulatory Asset Increase (Decrease)	760	(1,087)	3,931	2,299
Refunds (Collections) Adjustments	0	2,626	6	9,467
Ending Balance	13,980	9,826	13,980	9,826
Cost-recovery accounts:
Beginning Balance	18,097	9,328	15,420	7,223
Regulatory Asset Increase (Decrease)	1,321	2,188	4,177	4,309
Refunds (Collections) Adjustments	(121)	(7)	(300)	(23)
Ending Balance	19,297	11,509	19,297	11,509
Total
Beginning Balance	31,317	17,615	25,463	5,283
Regulatory Asset Increase (Decrease)	2,081	1,101	8,108	6,608
Refunds (Collections) Adjustments	(121)	2,619	(294)	9,444
Ending Balance	$ 33,277	21,335	$ 33,277	21,335
Authorized revenue, threshold percentage	2.00%		2.00%
MWRAM
Revenue accounts:
Beginning Balance	$ 15,278	10,549	$ 12,077	7,015
Regulatory Asset Increase (Decrease)	363	(1,124)	3,563	2,437
Refunds (Collections) Adjustments	0	2,625	1	2,598
Ending Balance	15,641	12,050	15,641	12,050
Cost of capital memorandum account
Revenue accounts:
Beginning Balance	(1,562)	(1,560)	(1,561)	(1,553)
Regulatory Asset Increase (Decrease)	0	(1)	(1)	(8)
Refunds (Collections) Adjustments	0	0	0	0
Ending Balance	(1,562)	(1,561)	(1,562)	(1,561)
Tax memorandum account
Revenue accounts:
Beginning Balance	333	332	333	(6,643)
Regulatory Asset Increase (Decrease)	0	1	0	(2)
Refunds (Collections) Adjustments	0	0	0	6,978
Ending Balance	333	333	333	333
All others
Revenue accounts:
Beginning Balance	(829)	(1,034)	(806)	(759)
Regulatory Asset Increase (Decrease)	397	37	369	(128)
Refunds (Collections) Adjustments	0	1	5	(109)
Ending Balance	(432)	(996)	(432)	(996)
Cost-recovery accounts:
Beginning Balance	446	444	445	446
Regulatory Asset Increase (Decrease)	0	0	1	2
Refunds (Collections) Adjustments	0	0	0	(4)
Ending Balance	446	444	446	444
Water supply costs
Cost-recovery accounts:
Beginning Balance	9,895	5,899	8,123	4,328
Regulatory Asset Increase (Decrease)	388	1,222	2,159	2,827
Refunds (Collections) Adjustments	0	1	1	(33)
Ending Balance	10,283	7,122	10,283	7,122
Pension
Cost-recovery accounts:
Beginning Balance	4,210	2,985	3,478	2,449
Regulatory Asset Increase (Decrease)	366	(253)	1,098	261
Refunds (Collections) Adjustments	0	0	0	22
Ending Balance	4,576	2,732	4,576	2,732
PRVMA
Cost-recovery accounts:
Beginning Balance	928	0	1,108	0
Regulatory Asset Increase (Decrease)	0	1,219	0	1,219
Refunds (Collections) Adjustments	(121)	(8)	(301)	(8)
Ending Balance	807	1,211	807	1,211
CEMA
Cost-recovery accounts:
Beginning Balance	2,618	0	2,266	0
Regulatory Asset Increase (Decrease)	567	0	919	0
Refunds (Collections) Adjustments	0	0	0	0
Ending Balance	$ 3,185	$ 0	$ 3,185	$ 0

Capitalization (Details) - USD ($) $ / shares in Units, $ in Thousands	Mar. 08, 2021	Sep. 30, 2021	Dec. 31, 2020
Subsidiary, Sale of Stock [Line Items]
Common stock, par value (usd per share)	$ 0.001	$ 0.001	$ 0.001
Offering price per share (usd per share)	$ 59.00
Public Stock Offering
Subsidiary, Sale of Stock [Line Items]
Shares issued in offering (in shares)	1,030,000
Net proceeds from stock offering	$ 66,775
Over-Allotment Option
Subsidiary, Sale of Stock [Line Items]
Shares issued in offering (in shares)	154,500

Equity Plans - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Restricted stock and deferred restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs	$ 5,442		$ 5,442
Recognition period for unrecognized compensation cost			1 year 8 months 19 days
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of equity instruments granted (in shares)	1,134	761	46,567	43,474
Service-based restricted stock vesting period	1 year	3 years	1 year	3 years
Grant date fair value of equity instruments granted (usd per share)	$ 69.20	$ 58.63	$ 64.65	$ 63.87
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of equity instruments granted (in shares)	0	58	30,641	24,777
Grant date fair value of equity instruments granted (usd per share)	$ 0.00	$ 62.95	$ 66.33	$ 65.02
Performance Shares \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target vesting percentage			0.00%
Performance Shares \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target vesting percentage			150.00%
Market-based RSU \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target vesting percentage			0.00%
Market-based RSU \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target vesting percentage			200.00%
Incentive Plan \| Restricted stock and deferred restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issuable upon exercise of Incentive Plan awards (in shares)	174,154		174,154
Remaining shares available for issuance under the Incentive Plan (in shares)	685,660		685,660
CTWS Plan \| Restricted stock and deferred restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issuable upon exercise of Incentive Plan awards (in shares)	56,326		56,326
Employee Stock Purchase Plan (ESPP)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs	$ 124		$ 124
Plan expense	$ 91	$ 85	$ 265	$ 244

Equity Plans - Schedule of Compensation Costs Charged to Income and Proceeds from the Exercise of Any Restricted Stock and Similar Instruments that are Recorded to Additional Paid-In Capital and Common Stock, by Award Type (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation costs charged to income:	$ 1,130	$ 1,058	$ 3,201	$ 2,318
Restricted stock and deferred restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation costs charged to income:	954	906	2,844	1,995
Employee Stock Purchase Plan (ESPP)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation costs charged to income:	176	152	357	323
ESPP proceeds	$ 1,000	$ 860	$ 2,026	$ 1,830

Bank Borrowings and Long-Term Liabilities (Details) - USD ($)			9 Months Ended
	May 13, 2021	Apr. 23, 2021	Sep. 30, 2021	Sep. 30, 2020	Dec. 01, 2021	Aug. 04, 2021	Jun. 25, 2021	Mar. 02, 2021
Debt Instrument [Line Items]
Repayments of lines of credit			$ 120,120,000	$ 218,290,000
Line of Credit \| Revolving Credit Facility \| Chase Bank, N.A. \| San Jose Water Company
Debt Instrument [Line Items]
Repayments of lines of credit		$ 140,000,000
Line of Credit \| Revolving Credit Facility \| Chase Bank, N.A. \| San Jose Water Company \| SJWC Credit Agreement
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		140,000,000
Line of Credit \| Revolving Credit Facility \| Chase Bank, N.A. \| SJW Group and CLWSC \| SJWTX Credit Agreement
Debt Instrument [Line Items]
Repayments of lines of credit		5,000,000
Line of credit facility, maximum borrowing capacity		5,000,000
Line of Credit \| Letter of Credit Sublimit \| Chase Bank, N.A. \| San Jose Water Company \| SJWC Credit Agreement
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		15,000,000
Line of Credit \| Letter of Credit Sublimit \| Chase Bank, N.A. \| SJW Group and CLWSC \| SJWTX Credit Agreement
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 1,000,000
Notes Payable to Banks \| 3.89% Note Due March 2041 \| Maine Water Company
Debt Instrument [Line Items]
Aggregate principal amount								$ 17,000,000
Interest rate								3.89%
Notes Payable to Banks \| 4.01% Note Due March 2041 \| CLWSC
Debt Instrument [Line Items]
Interest rate	4.01%
Proceeds from issuance of unsecured debt	$ 20,000,000
Notes Payable to Banks \| 4.01% Note Due March 2041 \| CLWSC \| Maximum
Debt Instrument [Line Items]
Aggregate principal amount	$ 30,000,000
Notes Payable, Other Payables \| Series N Notes \| San Jose Water Company
Debt Instrument [Line Items]
Aggregate principal amount							$ 50,000,000
Interest rate							3.00%
Notes Payable, Other Payables \| Series 2021A Notes \| Connecticut Water Company
Debt Instrument [Line Items]
Aggregate principal amount						$ 50,000,000
Interest rate						3.07%
Notes Payable, Other Payables \| Series 2021B Notes \| Connecticut Water Company \| Forecast
Debt Instrument [Line Items]
Aggregate principal amount					$ 50,000,000
Interest rate					3.10%
Notes Payable, Other Payables \| Series O Notes \| San Jose Water Company
Debt Instrument [Line Items]
Aggregate principal amount						$ 50,000,000
Interest rate						3.00%

Benefit Plans - Narrative (Details) $ in Thousands	3 Months Ended	9 Months Ended
Benefit Plans - Narrative (Details) $ in Thousands	Sep. 30, 2021 USD ($)	Sep. 30, 2021 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Estimated employer contributions for the current fiscal year	$ 9,043	$ 9,043
Employer plan contributions	$ 3,517	$ 4,997
CTWS Employees
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase		1.50%

Benefit Plans - Schedule of Net Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Retirement Benefits [Abstract]
Service cost	$ 2,711	$ 2,390	$ 8,134	$ 7,170
Interest cost	2,556	2,860	7,666	8,580
Expected return on assets	(4,748)	(4,126)	(14,242)	(12,429)
Unrecognized actuarial loss	1,788	1,296	5,362	3,888
Amortization of prior service cost	12	39	37	115
Net periodic benefit cost	$ 2,319	$ 2,459	$ 6,957	$ 7,324

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Income Taxes (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 2,749	$ 4,578	$ 5,159	$ 9,226
Effective consolidated income tax rate	13.00%	15.00%	11.00%	16.00%
Unrecognized tax benefits	$ 7,537		$ 7,537		$ 6,468

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References + Details

Fair Value Measurement (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, book value	$ 1,446,320	$ 1,363,821
Fair Value, Inputs, Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	1,573,581	1,570,727
Fair Value, Inputs, Level 1 \| Supplemental Employee Retirement Plan
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of plan assets	$ 3,738	$ 3,014

- Definition

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

+ References + Details

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References + Details

Segment and Non-Tariffed Business Reporting - Narrative (Details)	9 Months Ended
	Sep. 30, 2021 subsidiary
Segment Reporting [Abstract]
Number of subsidiaries	4

Segment and Non-Tariffed Business Reporting - Schedule of Segment Reporting Information, by Segment (Details) $ in Thousands	3 Months Ended						9 Months Ended		12 Months Ended
	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Sep. 30, 2021 USD ($) reportingUnit	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($) reportingUnit
Segment Reporting Information [Line Items]
Operating revenue	$ 166,923			$ 165,863			$ 433,949	$ 428,826
Operating expense	133,149			123,980			354,457	335,446
Operating income (loss)	33,774			41,883			79,492	93,380
Net income (loss)	19,068	$ 20,775	$ 2,616	26,093	$ 19,721	$ 2,417	42,459	48,231
Depreciation and amortization	23,837			22,417			70,787	66,552
Interest on long-term debt and other interest expense	13,535			13,174			40,655	39,638
Provision (benefit) for income taxes	2,749			4,578			5,159	9,226
Assets	3,469,741			3,259,714			$ 3,469,741	3,259,714	$ 3,311,465
Number of reporting units \| reportingUnit							2		2
Water Utility Services \| Regulated
Segment Reporting Information [Line Items]
Operating revenue	162,352			161,646			$ 421,985	416,085
Operating expense	129,915			119,885			343,965	323,087
Operating income (loss)	32,437			41,761			78,020	92,998
Net income (loss)	20,625			25,053			46,909	53,117
Depreciation and amortization	23,209			21,782			68,913	64,654
Interest on long-term debt and other interest expense	8,805			8,112			25,323	24,575
Provision (benefit) for income taxes	3,537			9,450			8,001	16,101
Assets	3,352,976			3,131,778			3,352,976	3,131,778
Water Utility Services \| Non-tariffed
Segment Reporting Information [Line Items]
Operating revenue	3,168			2,814			7,897	8,524
Operating expense	2,156			2,161			5,467	5,281
Operating income (loss)	1,012			653			2,430	3,243
Net income (loss)	879			827			2,278	3,178
Depreciation and amortization	113			116			332	332
Interest on long-term debt and other interest expense	0			0			0	0
Provision (benefit) for income taxes	280			179			665	909
Assets	7,141			8,589			7,141	8,589
Real Estate Services \| Non-tariffed
Segment Reporting Information [Line Items]
Operating revenue	1,403			1,403			4,067	4,217
Operating expense	956			961			2,718	2,642
Operating income (loss)	447			442			1,349	1,575
Net income (loss)	294			310			913	1,141
Depreciation and amortization	292			296			872	896
Interest on long-term debt and other interest expense	0			0			0	0
Provision (benefit) for income taxes	100			105			305	361
Assets	44,629			45,980			44,629	45,980
All Other \| Non-tariffed
Segment Reporting Information [Line Items]
Operating revenue	0			0			0	0
Operating expense	122			973			2,307	4,436
Operating income (loss)	(122)			(973)			(2,307)	(4,436)
Net income (loss)	(2,730)			(97)			(7,641)	(9,205)
Depreciation and amortization	223			223			670	670
Interest on long-term debt and other interest expense	4,730			5,062			15,332	15,063
Provision (benefit) for income taxes	(1,168)			(5,156)			(3,812)	(8,145)
Assets	64,995			73,367			64,995	73,367
SJW Group \| Regulated
Segment Reporting Information [Line Items]
Operating revenue	162,352			161,646			421,985	416,085
Operating expense	129,915			119,885			343,965	323,087
Operating income (loss)	32,437			41,761			78,020	92,998
Net income (loss)	20,625			25,053			46,909	53,117
Depreciation and amortization	23,209			21,782			68,913	64,654
Interest on long-term debt and other interest expense	8,805			8,112			25,323	24,575
Provision (benefit) for income taxes	3,537			9,450			8,001	16,101
Assets	3,352,976			3,131,778			3,352,976	3,131,778
SJW Group \| Non-tariffed
Segment Reporting Information [Line Items]
Operating revenue	4,571			4,217			11,964	12,741
Operating expense	3,234			4,095			10,492	12,359
Operating income (loss)	1,337			122			1,472	382
Net income (loss)	(1,557)			1,040			(4,450)	(4,886)
Depreciation and amortization	628			635			1,874	1,898
Interest on long-term debt and other interest expense	4,730			5,062			15,332	15,063
Provision (benefit) for income taxes	(788)			(4,872)			(2,842)	(6,875)
Assets	$ 116,765			$ 127,936			$ 116,765	$ 127,936

Subsequent Events (Details) $ in Thousands				3 Months Ended			9 Months Ended
Subsequent Events (Details) $ in Thousands	Oct. 29, 2021 USD ($) property	Jun. 29, 2021 USD ($)	Sep. 28, 2020 USD ($) property	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)
Subsequent Event [Line Items]
Gain on sale of real estate investments		$ 3,000			$ 0	$ 0	$ 3,000	$ 0
San Jose Water Company
Subsequent Event [Line Items]
Number of properties sold \| property			6
Proceeds from sale of real estate held-for-investment			$ 1,075
Gain on sale of real estate investments			$ 1,048
San Jose Water Company \| Forecast
Subsequent Event [Line Items]
Gain on sale of real estate investments				$ 13,600
Subsequent Event \| San Jose Water Company
Subsequent Event [Line Items]
Number of properties sold \| property	2
Proceeds from sale of real estate held-for-investment	$ 13,150
Proceeds from sale of land held-for-investment	$ 2,600