Business Segments (Tables)

12 Months Ended

Dec. 31, 2022

Segment Reporting [Abstract]

Schedule of reporting segments information

Capital additions reflect capital expenditures paid in cash and exclude U.S. government-funded and third-party prime funded capital expenditures for ASUS and property installed by developers and conveyed to GSWC and BVESI.

	As Of And For The Year Ended December 31, 2022
							AWR		Consolidated
(dollars in thousands)	Water		Electric		ASUS		Parent		AWR
Operating revenues	$	340,602	$	39,986	$	110,940	$	—	$	491,528
Operating income (loss)	92,455		11,740		22,449		(8)		126,636
Interest expense, net	21,659		831		(132)		2,343		24,701
Net utility plant	1,616,718		119,560		17,488		—		1,753,766
Depreciation and amortization expense (1)	34,805		2,792		3,718		—		41,315
Income tax expense (benefit)	16,346		2,439		5,476		(597)		23,664
Capital additions	146,730		18,069		1,441		—		166,240

	As Of And For The Year Ended December 31, 2021
							AWR		Consolidated
(dollars in thousands)	Water		Electric		ASUS		Parent		AWR
Operating revenues	$	347,112	$	38,345	$	113,396	$	—	$	498,853
Operating income (loss)	107,573		10,738		22,675		(9)		140,977
Interest expense, net	21,046		141		(637)		791		21,341
Net utility plant	1,499,745		106,508		19,751		—		1,626,004
Depreciation and amortization expense (1)	33,384		2,572		3,640		—		39,596
Income tax expense/(benefit)	22,095		2,975		5,434		(81)		30,423
Capital additions	123,526		19,859		1,130		—		144,515

	As Of And For The Year Ended December 31, 2020
	GSWC						AWR		Consolidated
(dollars in thousands)	Water		Electric		ASUS		Parent		AWR
Operating revenues	$	330,637	$	37,024	$	120,582	$	—	$	488,243
Operating income (loss)	97,896		10,303		22,309		(9)		130,499
Interest expense, net	20,312		584		(496)		330		20,730
Net utility plant	1,400,489		89,308		22,246		—		1,512,043
Depreciation and amortization expense (1)	30,969		2,479		3,402		—		36,850
Income tax expense/(benefit)	20,515		2,689		5,201		(208)		28,197
Capital additions	107,355		18,393		4,675		—		130,423

Schedule of reconciliation of total utility plant (a key figure for rate-making) to total consolidated assets

The following table reconciles total utility plant (a key figure for rate-making) to total consolidated assets (in thousands):

	December 31,
	2022		2021
Total utility plant	$	1,753,766	$	1,626,004
Other assets	280,608		274,979
Total consolidated assets	$	2,034,374	$	1,900,983