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Regulatory Matters (Tables)
 9 Months Ended
Sep. 30, 2024
Regulated Operations [Abstract]  
Schedule of regulatory assets, less regulatory liabilities in the consolidated balance sheets for continuing operations Regulatory assets, less regulatory liabilities, included in the consolidated balance sheets are as follows:
(dollars in thousands)September 30,
2024		December 31,
2023
GSWC
2022/2023 general rate case memorandum accounts (unbilled revenue)$41,656 $52,795 
Water revenue adjustment mechanism, net of modified cost balancing account44,092 41,545 
Asset retirement obligations7,375 7,099 
Flowed-through deferred income taxes, net8,919 3,190 
Low income rate assistance balancing accounts8,164 5,763 
Other regulatory assets9,254 10,661 
Excess deferred income taxes(69,257)(70,189)
Pensions and other post-retirement obligations (4,824)(4,867)
Other regulatory liabilities(576)(268)
Total GSWC$44,803 $45,729 
BVES
Derivative instrument memorandum account (Note 5)8,320 2,360 
Wildfire mitigation and other fire prevention related costs memorandum accounts20,904 17,716 
Electric supply cost adjustment mechanism
284 2,583 
Other regulatory assets8,426 7,697 
Other regulatory liabilities(7,676)(6,578)
Total AWR$75,061 $69,507