v3.25.2
Business Segments - Schedule of Business Segments (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2025
Jun. 30, 2024
Details of reportable segment            
Total operating revenues $ 163,066   $ 155,328   $ 311,079 $ 290,579
Supply costs 36,920   32,246   66,408 57,417
Other operation 12,310   10,733   22,800 20,356
Administrative and general 25,222   23,487   52,097 48,834
Depreciation and amortization 11,681   10,770   23,263 21,492
Maintenance 6,129   3,535   10,276 6,760
Property and other taxes 6,955   6,612   13,907 13,099
ASUS construction 12,890   16,197   25,823 31,899
Operating Income 50,959   51,748   96,505 90,722
Interest expense (12,108)   (13,137)   (24,190) (25,992)
Interest income 1,498   2,093   3,511 4,163
(Gain) loss on investments held in a trust 2,748   976   2,161 3,046
Income tax expense 10,235   10,359   18,697 17,755
Other segment items income (expense) 828   543   1,244 815
Net Income 33,690 $ 26,844 31,864 $ 23,135 60,534 54,999
Capital additions 50,916   61,748   118,481 109,298
Reportable Legal Entities            
Details of reportable segment            
Total operating revenues 163,066   155,328   311,079 290,579
Supply costs 36,920   32,246   66,408 57,417
Other operation 12,310   10,733   22,800 20,356
Administrative and general 25,220   23,485   52,094 48,831
Depreciation and amortization 11,681   10,770   23,263 21,492
Maintenance 6,129   3,535   10,276 6,760
Property and other taxes 6,955   6,612   13,907 13,099
ASUS construction 12,890   16,197   25,823 31,899
Operating Income 50,961   51,750   96,508 90,725
Interest expense (10,646)   (11,526)   (21,423) (22,634)
Interest income 1,488   2,072   3,483 4,117
(Gain) loss on investments held in a trust 2,748   976   2,161 3,046
Income tax expense 10,780   10,770   19,718 18,714
Other segment items income (expense) 419   286   835 558
Net Income 34,190   32,788   61,846 57,098
Capital additions 50,916   61,748   118,481 109,298
AWR | Intersegment Eliminations            
Details of reportable segment            
Total operating revenues 0   0   0 0
Supply costs 0   0   0 0
Other operation 0   0   0 0
Administrative and general 2   2   3 3
Depreciation and amortization 0   0   0 0
Maintenance 0   0   0 0
Property and other taxes 0   0   0 0
ASUS construction 0   0   0 0
Operating Income (2)   (2)   (3) (3)
Interest expense (1,462)   (1,611)   (2,767) (3,358)
Interest income 10   21   28 46
(Gain) loss on investments held in a trust 0   0   0 0
Income tax expense (545)   (411)   (1,021) (959)
Other segment items income (expense) 409   257   409 257
Net Income (500)   (924)   (1,312) (2,099)
Capital additions 0   0   0 0
GOLDEN STATE WATER COMPANY            
Details of reportable segment            
Total operating revenues 119,697   110,424   221,700 200,689
Other operation 8,800   7,442   15,475 14,022
Administrative and general 15,952   15,933   33,609 32,910
Depreciation and amortization 9,895   9,043   19,719 18,077
Maintenance 2,824   2,210   4,828 4,038
Property and other taxes 5,710   5,475   11,334 10,724
Operating Income 42,557   40,565   77,353 69,732
Interest expense (9,265)   (9,716)   (18,593) (19,108)
Interest income 936   1,574   2,208 3,085
(Gain) loss on investments held in a trust         2,161 3,046
Income tax expense 9,096   8,487   15,610 14,311
Net Income 28,140 $ 19,906 25,195 $ 17,794 48,046 42,989
GOLDEN STATE WATER COMPANY | Water:            
Details of reportable segment            
Total operating revenues 119,697   110,424   221,700 200,689
GOLDEN STATE WATER COMPANY | Reportable Legal Entities | Water:            
Details of reportable segment            
Total operating revenues 119,697   110,424   221,700 200,689
Supply costs 33,959   29,756   59,382 51,186
Other operation 8,800   7,442   15,475 14,022
Administrative and general 15,952   15,933   33,609 32,910
Depreciation and amortization 9,895   9,043   19,719 18,077
Maintenance 2,824   2,210   4,828 4,038
Property and other taxes 5,710   5,475   11,334 10,724
ASUS construction 0   0   0 0
Operating Income 42,557   40,565   77,353 69,732
Interest expense (9,265)   (9,716)   (18,593) (19,108)
Interest income 936   1,574   2,208 3,085
(Gain) loss on investments held in a trust 2,748   976   2,161 3,046
Income tax expense 9,096   8,487   15,610 14,311
Other segment items income (expense) 260   283   527 545
Net Income 28,140   25,195   48,046 42,989
Capital additions 43,221   54,349   101,079 95,627
BVES | Electric:            
Details of reportable segment            
Total operating revenues 12,928   8,703   27,930 20,908
BVES | Reportable Legal Entities | Electric:            
Details of reportable segment            
Total operating revenues 12,928   8,703   27,930 20,908
Supply costs 2,961   2,490   7,026 6,231
Other operation 1,079   930   2,320 1,919
Administrative and general 3,648   2,220   6,746 4,703
Depreciation and amortization 899   893   1,784 1,777
Maintenance 1,725   405   2,636 778
Property and other taxes 650   532   1,336 1,126
ASUS construction 0   0   0 0
Operating Income 1,966   1,233   6,082 4,374
Interest expense (1,202)   (1,257)   (2,338) (2,453)
Interest income 350   306   874 637
(Gain) loss on investments held in a trust 0   0   0 0
Income tax expense 85   (39)   1,132 521
Other segment items income (expense) 147   21   316 47
Net Income 1,176   342   3,802 2,084
Capital additions 6,129   5,945   13,982 11,161
ASUS | Reportable Legal Entities | Contracted services:            
Details of reportable segment            
Total operating revenues 30,441   36,201   61,449 68,982
Supply costs 0   0   0 0
Other operation 2,431   2,361   5,005 4,415
Administrative and general 5,620   5,332   11,739 11,218
Depreciation and amortization 887   834   1,760 1,638
Maintenance 1,580   920   2,812 1,944
Property and other taxes 595   605   1,237 1,249
ASUS construction 12,890   16,197   25,823 31,899
Operating Income 6,438   9,952   13,073 16,619
Interest expense (179)   (553)   (492) (1,073)
Interest income 202   192   401 395
(Gain) loss on investments held in a trust 0   0   0 0
Income tax expense 1,599   2,322   2,976 3,882
Other segment items income (expense) 12   (18)   (8) (34)
Net Income 4,874   7,251   9,998 12,025
Capital additions 1,566   1,454   3,420 2,510
Golden State Water Company and Bear Valley Electric Service Inc.            
Details of reportable segment            
Depreciation on transportation equipment $ 300   $ 200   $ 500 $ 300