CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash Flows From Operating Activities:
Net Income	$ 78,396	$ 94,347	$ 86,425
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	41,697	39,974	37,204
Provision for doubtful accounts	1,043	1,119	1,433
Deferred income taxes and investment tax credits	2,803	3,561	2,243
Stock-based compensation expense	2,571	2,566	2,463
(Gain) loss on sale of assets	(75)	(465)	31
Loss (gain) on investments held in a trust	5,177	(4,287)	(3,024)
Other - net	113	84	(908)
Changes in assets and liabilities:
Accounts receivable - customers	5,424	(4,688)	(13,272)
Unbilled revenue- receivable	(9,699)	1,037	6,678
Other accounts receivable	2,115	(1,422)	(1,204)
Receivable from the U.S. government	5,638	4,713	3,889
Materials and supplies	(2,460)	(3,544)	(2,190)
Prepayments and other assets	3,146	1,323	1,686
Contract Assets	(5,395)	235	(588)
Regulatory Assets / Liabilities	(18,915)	(5,842)	10,150
Accounts payable	11,767	(2,881)	5,348
Income taxes receivable / payable	(6,479)	(2,254)	12,270
Contract liabilities	646	(1,543)	(9,367)
Accrued pension and other post-retirement benefits	(3,087)	3,051	1,444
Other liabilities	(4,749)	2,000	2,593
Cash Flows From Operating Activities	117,799	115,584	122,170
Cash Flows From Investing Activities:
Capital expenditures	(166,240)	(144,515)	(130,423)
Proceeds from sale of assets	59	565	88
Other investments	921	1,142	1,275
Net Cash Provided by (Used in) Investing Activities	(167,102)	(145,092)	(131,610)
Cash Flows From Financing Activities:
Receipt of advances for and contributions in aid of construction	6,901	12,432	9,338
Proceeds from stock option exercises	0	0	30
Refunds on advances for construction	5,321	4,666	3,729
Retirement or repayments of long-term debt	(377)	(28,356)	(336)
Proceeds from issuance of long-term debt, net of issuance costs	34,789	0	159,413
Net change in notes payable to banks	72,000	71,300	(70,800)
Dividends paid	(56,356)	(51,689)	(47,206)
Other	(1,299)	(1,287)	(1,867)
Net Cash Provided by (Used in) Financing Activities	50,337	(2,266)	44,843
Net change in cash and cash equivalents	1,034	(31,774)	35,403
Cash and cash equivalents, beginning of the year	4,963	36,737	1,334
Cash and cash equivalents, end of year	5,997	4,963	36,737
GSWC
Cash Flows From Operating Activities:
Net Income	53,770	69,215	64,971
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	35,072	33,643	32,477
Provision for doubtful accounts	1,018	1,018	1,018
Deferred income taxes and investment tax credits	855	2,308	1,181
Stock-based compensation expense	2,269	2,313	2,349
(Gain) loss on sale of assets	0	(409)	0
Loss (gain) on investments held in a trust	5,177	(4,287)	(3,024)
Other - net	9	200	(576)
Changes in assets and liabilities:
Accounts receivable - customers	6,263	(4,287)	(12,126)
Unbilled revenue- receivable	(5,519)	1,195	1,693
Other accounts receivable	931	592	(1,364)
Materials and supplies	(736)	(1,725)	(2,166)
Prepayments and other assets	2,125	1,860	1,124
Regulatory Assets / Liabilities	(12,704)	(2,854)	13,278
Accounts payable	7,671	(10)	1,810
Inter-company receivable / payable	(805)	1,479	(1,911)
Income taxes receivable / payable	(4,664)	(1,640)	12,339
Accrued pension and other post-retirement benefits	(3,228)	2,908	1,390
Other liabilities	(4,034)	1,165	1,260
Cash Flows From Operating Activities	94,508	100,294	110,337
Cash Flows From Investing Activities:
Capital expenditures	(146,730)	(123,526)	(116,409)
Note receivable from AWR parent	0	(26,000)	(6,000)
Receipt of payment of note receivable from AWR parent	0	26,000	6,000
Proceeds from sale of assets	0	409	0
Other investments	1,001	1,142	1,275
Net Cash Provided by (Used in) Investing Activities	(147,731)	(124,259)	(117,684)
Cash Flows From Financing Activities:
Other	(1,135)	(1,163)	(1,662)
Proceeds from issuance of Common Shares to Parent	0	0	60,000
Receipt of advances for and contributions in aid of construction	6,901	12,397	9,338
Payments for Proceeds from Related Party Debt	80,000	49,000	(158,000)
Payments of Dividends from Subsidiaries	(27,000)	(38,300)	(22,500)
Refunds on advances for construction	5,321	4,666	3,729
Retirement or repayments of long-term debt	(377)	(28,356)	(336)
Proceeds from issuance of long-term debt, net of issuance costs	0	0	159,413
Net Cash Provided by (Used in) Financing Activities	53,068	(11,088)	42,524
Net change in cash and cash equivalents	(155)	(35,053)	35,177
Cash and cash equivalents, beginning of the year	525	35,578	401
Cash and cash equivalents, end of year	$ 370	$ 525	$ 35,578