v3.26.1
Business Segments - Schedule of Business Segments (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Details of reportable segment    
Total operating revenues $ 169,191 $ 148,013
Supply costs 34,658 29,488
Other operation 11,268 10,490
Administrative and general 28,154 26,875
Depreciation and amortization 12,684 11,582
Maintenance 5,700 4,147
Property and other taxes 8,023 6,952
ASUS construction 17,333 12,933
Operating Income 51,371 45,546
Interest expense (12,107) (12,082)
Interest income 976 2,013
(Gain) loss on investments held in a trust (1,272) (586)
Income tax expense 9,872 8,462
Other segment items income (expense) 852 415
Net Income 29,948 26,844
Capital additions 49,051 67,565
Reportable Legal Entities    
Details of reportable segment    
Total operating revenues 169,191 148,013
Supply costs 34,658 29,488
Other operation 11,268 10,490
Administrative and general 28,152 26,874
Depreciation and amortization 12,684 11,582
Maintenance 5,700 4,147
Property and other taxes 8,023 6,952
ASUS construction 17,333 12,933
Operating Income 51,373 45,547
Interest expense (10,716) (10,777)
Interest income 968 1,995
(Gain) loss on investments held in a trust (1,272) (586)
Income tax expense 10,337 8,938
Other segment items income (expense) 795 415
Net Income 30,811 27,656
Capital additions 49,051 67,565
AWR | Intersegment Eliminations    
Details of reportable segment    
Total operating revenues 0 0
Supply costs 0 0
Other operation 0 0
Administrative and general 2 1
Depreciation and amortization 0 0
Maintenance 0 0
Property and other taxes 0 0
ASUS construction 0 0
Operating Income (2) (1)
Interest expense (1,391) (1,305)
Interest income 8 18
(Gain) loss on investments held in a trust 0 0
Income tax expense (465) (476)
Other segment items income (expense) 57 0
Net Income (863) (812)
Capital additions 0 0
GOLDEN STATE WATER COMPANY    
Details of reportable segment    
Total operating revenues 113,110 102,003
Other operation 7,144 6,675
Administrative and general 17,754 17,657
Depreciation and amortization 10,659 9,824
Maintenance 2,074 2,004
Property and other taxes 6,520 5,624
Operating Income 38,698 34,796
Interest expense (9,392) (9,328)
Interest income 478 1,272
(Gain) loss on investments held in a trust (1,272) (586)
Income tax expense 7,564 6,514
Net Income 21,683 19,906
GOLDEN STATE WATER COMPANY | Water:    
Details of reportable segment    
Total operating revenues 113,110 102,003
GOLDEN STATE WATER COMPANY | Reportable Legal Entities | Water:    
Details of reportable segment    
Total operating revenues 113,110 102,003
Supply costs 30,261 25,423
Other operation 7,144 6,675
Administrative and general 17,754 17,657
Depreciation and amortization 10,659 9,824
Maintenance 2,074 2,004
Property and other taxes 6,520 5,624
ASUS construction 0 0
Operating Income 38,698 34,796
Interest expense (9,392) (9,328)
Interest income 478 1,272
(Gain) loss on investments held in a trust (1,272) (586)
Income tax expense 7,564 6,514
Other segment items income (expense) 735 266
Net Income 21,683 19,906
Capital additions 42,244 57,858
BVES | Electric:    
Details of reportable segment    
Total operating revenues 18,657 15,002
BVES | Reportable Legal Entities | Electric:    
Details of reportable segment    
Total operating revenues 18,657 15,002
Supply costs 4,397 4,065
Other operation 1,341 1,241
Administrative and general 3,666 3,098
Depreciation and amortization 1,066 885
Maintenance 2,250 911
Property and other taxes 822 686
ASUS construction 0 0
Operating Income 5,115 4,116
Interest expense (1,253) (1,136)
Interest income 290 524
(Gain) loss on investments held in a trust 0 0
Income tax expense 884 1,047
Other segment items income (expense) 45 169
Net Income 3,313 2,626
Capital additions 4,932 7,853
ASUS | Reportable Legal Entities | Contracted services:    
Details of reportable segment    
Total operating revenues 37,424 31,008
Supply costs 0 0
Other operation 2,783 2,574
Administrative and general 6,732 6,119
Depreciation and amortization 959 873
Maintenance 1,376 1,232
Property and other taxes 681 642
ASUS construction 17,333 12,933
Operating Income 7,560 6,635
Interest expense (71) (313)
Interest income 200 199
(Gain) loss on investments held in a trust 0 0
Income tax expense 1,889 1,377
Other segment items income (expense) 15 (20)
Net Income 5,815 5,124
Capital additions 1,875 1,854
Golden State Water Company and Bear Valley Electric Service Inc.    
Details of reportable segment    
Depreciation on transportation equipment $ 300 $ 300