CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating Revenues
Water	$ 417,410	$ 433,473	$ 340,602
Electric	51,645	41,832	39,986
Contracted services	126,404	120,394	110,940
Total operating revenues	595,459	595,699	491,528
Operating Expenses
Water purchased	74,274	72,864	75,939
Power purchased for pumping	15,025	12,829	11,861
Groundwater production assessment	24,145	20,850	19,071
Power purchased for resale	11,630	13,275	15,039
Supply cost balancing accounts	(1,894)	12,118	(12,000)
Other operation	41,318	40,271	38,095
Administrative and general	100,941	88,273	86,190
Depreciation and amortization	43,647	42,403	41,315
Maintenance	20,255	14,218	13,392
Property and other taxes	27,091	24,046	22,894
ASUS construction	54,544	57,912	53,171
Gain on sale of assets	0	(100)	(75)
Total operating expenses	410,976	398,959	364,892
Operating Income	184,483	196,740	126,636
Other Income and Expenses
Interest Expense, Nonoperating	50,382	42,762	27,027
Interest income	7,874	7,416	2,326
Other, net	7,466	5,126	125
Total other income and expenses	(35,042)	(30,220)	(24,576)
Income before income taxes	149,441	166,520	102,060
Income tax expense	30,173	41,599	23,664
Net Income	$ 119,268	$ 124,921	$ 78,396
Basic Earnings Per Common Share
Weighted Average Number of Shares Outstanding (in shares)	37,464	36,976	36,955
Basic earnings per Common Share (usd per share)	$ 3.17	$ 3.37	$ 2.12
Fully Diluted Earnings Per Share
Weighted Average Number of Diluted Shares (in shares)	37,583	37,077	37,039
Earnings Per Share, Diluted	$ 3.17	$ 3.36	$ 2.11
Dividends Paid Per Common Share (in USD per share)	$ 1.791	$ 1.655	$ 1.525
AWR
Other Income and Expenses
Income before income taxes	$ 117,332	$ 123,207	$ 77,799
Income tax expense	(1,936)	(1,714)	(597)
Net Income	$ 119,268	$ 124,921	$ 78,396
Basic Earnings Per Common Share
Weighted Average Number of Shares Outstanding (in shares)	37,464	36,976	36,955
Basic earnings per Common Share (usd per share)	$ 3.17	$ 3.37	$ 2.12
Fully Diluted Earnings Per Share
Weighted Average Number of Diluted Shares (in shares)	37,583	37,077	37,039
Earnings Per Share, Diluted	$ 3.17	$ 3.36	$ 2.11
Dividends Paid Per Common Share (in USD per share)	$ 1.791	$ 1.655	$ 1.525
GSWC
Operating Revenues
Water	$ 417,410	$ 433,473	$ 340,602
Total operating revenues	417,410	433,473	340,602
Operating Expenses
Water purchased	74,274	72,864	75,939
Power purchased for pumping	15,025	12,829	11,861
Groundwater production assessment	24,145	20,850	19,071
Supply cost balancing accounts	(1,621)	13,839	(8,643)
Other operation	28,349	29,064	28,117
Administrative and general	64,510	59,313	58,358
Depreciation and amortization	37,187	35,886	34,805
Maintenance	9,788	9,906	9,559
Property and other taxes	22,233	19,845	19,080
Gain on sale of assets	0	(100)	0
Total operating expenses	273,890	274,296	248,147
Operating Income	143,520	159,177	92,455
Other Income and Expenses
Interest Expense, Nonoperating	38,532	31,283	22,742
Interest income	6,018	5,557	1,083
Other, net	6,326	4,946	(680)
Total other income and expenses	(26,188)	(20,780)	(22,339)
Income before income taxes	117,332	138,397	70,116
Income tax expense	22,869	35,689	16,346
Net Income	$ 94,463	$ 102,708	$ 53,770