CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating Revenues
Water	$ 433,473	$ 340,602	$ 347,112
Electric	41,832	39,986	38,345
Contracted services	120,394	110,940	113,396
Total operating revenues	595,699	491,528	498,853
Operating Expenses
Water purchased	72,864	75,939	77,914
Power purchased for pumping	12,829	11,861	11,103
Groundwater production assessment	20,850	19,071	19,412
Power purchased for resale	13,275	15,039	11,240
Supply cost balancing accounts	12,118	(12,000)	(11,421)
Other operation	40,271	38,095	34,738
Administrative and general	88,273	86,190	83,547
Depreciation and amortization	42,403	41,315	39,596
Maintenance	14,218	13,392	12,781
Property and other taxes	24,046	22,894	22,522
ASUS construction	57,912	53,171	56,909
Gain on sale of assets	(100)	(75)	(465)
Total operating expenses	398,959	364,892	357,876
Operating Income	196,740	126,636	140,977
Other Income and Expenses
Interest expense	(42,762)	(27,027)	(22,834)
Interest income	7,416	2,326	1,493
Other, net	5,126	125	5,134
Total other income and expenses	(30,220)	(24,576)	(16,207)
Income before income taxes	166,520	102,060	124,770
Income tax expense	41,599	23,664	30,423
Net Income	$ 124,921	$ 78,396	$ 94,347
Basic Earnings Per Common Share
Weighted Average Number of Shares Outstanding (in shares)	36,976	36,955	36,921
Basic earnings per Common Share (usd per share)	$ 3.37	$ 2.12	$ 2.55
Fully Diluted Earnings Per Share
Weighted Average Number of Diluted Shares (in shares)	37,077	37,039	37,010
Earnings Per Share, Diluted	$ 3.36	$ 2.11	$ 2.55
Dividends Paid Per Common Share (in USD per share)	$ 1.655	$ 1.525	$ 1.400
AWR
Operating Revenues
Total operating revenues	$ 0	$ 0	$ 0
Operating Expenses
Depreciation and amortization	0	0	0
Other Income and Expenses
Income before income taxes	123,207	77,799	94,266
Income tax expense	(1,714)	(597)	(81)
Net Income	$ 124,921	$ 78,396	$ 94,347
Basic Earnings Per Common Share
Weighted Average Number of Shares Outstanding (in shares)	36,976	36,955	36,921
Basic earnings per Common Share (usd per share)	$ 3.37	$ 2.12	$ 2.55
Fully Diluted Earnings Per Share
Weighted Average Number of Diluted Shares (in shares)	37,077	37,039	37,010
Earnings Per Share, Diluted	$ 3.36	$ 2.11	$ 2.55
Dividends Paid Per Common Share (in USD per share)	$ 1.655	$ 1.525	$ 1.400
GSWC
Operating Revenues
Water	$ 433,473	$ 340,602	$ 347,112
Total operating revenues	433,473	340,602	347,112
Operating Expenses
Water purchased	72,864	75,939	77,914
Power purchased for pumping	12,829	11,861	11,103
Groundwater production assessment	20,850	19,071	19,412
Supply cost balancing accounts	13,839	(8,643)	(11,295)
Other operation	29,064	28,117	25,781
Administrative and general	59,313	58,358	55,552
Depreciation and amortization	35,886	34,805	33,384
Maintenance	9,906	9,559	9,056
Property and other taxes	19,845	19,080	19,041
Gain on sale of assets	(100)	0	(409)
Total operating expenses	274,296	248,147	239,539
Operating Income	159,177	92,455	107,573
Other Income and Expenses
Interest expense	(31,283)	(22,742)	(21,474)
Interest income	5,557	1,083	428
Other, net	4,946	(680)	4,783
Total other income and expenses	(20,780)	(22,339)	(16,263)
Income before income taxes	138,397	70,116	91,310
Income tax expense	35,689	16,346	22,095
Net Income	$ 102,708	$ 53,770	$ 69,215