Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2025

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:

	December 31,
(dollars in thousands)	2025		2024
GSWC
2022/2023 general rate case memorandum accounts (unbilled revenue)	$	22,107	$	37,711
Water revenue adjustment mechanism, net of the modified cost balancing account	8,407		29,738
Asset retirement obligations (Note 1)	8,071		7,501
Flowed-through deferred income taxes, net (Note 11)	20,932		12,506
Low income rate assistance balancing accounts	10,582		8,834
Other regulatory assets	11,927		11,352
Excess deferred income taxes (Note 11)	(63,223)		(63,682)
Pensions and other post-retirement obligations (Note 12)	(43,479)		(25,179)
Per-and Polyfluoroalkyl Substances (“PFAS”) Contamination Litigation Proceeds Memorandum Account	(10,987)		—
Other regulatory liabilities	(1,331)		(608)
Total GSWC	$	(36,994)	$	18,173
BVES
2023/2024 general rate case memorandum accounts (unbilled revenue)	8,221		9,777
Derivative instrument memorandum account (Note 5)	15,503		8,823
Wildfire mitigation and other fire prevention related costs memorandum accounts	11,336		14,681
Electric supply cost adjustment mechanism	4,182		392
Other regulatory assets	11,031		8,461
Other regulatory liabilities	(4,015)		(5,628)
Total BVES	$	46,258	$	36,506
Total AWR	$	9,264	$	54,679