Business Segments: (Tables)

3 Months Ended

Mar. 31, 2017

Segment Reporting [Abstract]

Schedule of reporting segments information

The tables below set forth information relating to GSWC’s operating segments, ASUS and its subsidiaries and other matters. Total assets by segment are not presented below, as certain of Registrant’s assets are not tracked by segment.  The utility plant amounts are net of respective accumulated provisions for depreciation. Capital additions reflect capital expenditures paid in cash and exclude U.S. government-funded and third-party prime contractor funded capital expenditures for ASUS and property installed by developers and conveyed to GSWC.

	As Of And For The Three Months Ended March 31, 2017
	GSWC						AWR			Consolidated
(dollars in thousands)	Water		Electric		ASUS		Parent			AWR
Operating revenues	$	66,404	$	10,502	$	21,904	$	—		$	98,810
Operating income (loss)	19,264		2,813		2,665		(4		)	24,738
Interest expense, net	5,145		375		74		52			5,646
Utility plant	1,075,513		56,015		5,631		—			1,137,159
Depreciation and amortization expense (1)	8,901		537		245		—			9,683
Income tax expense (benefit)	5,485		788		861		(279		)	6,855
Capital additions	22,984		723		287		—			23,994

	As Of And For The Three Months Ended March 31, 2016
	GSWC						AWR			Consolidated
(dollars in thousands)	Water		Electric		ASUS		Parent			AWR
Operating revenues	$	66,312	$	10,573	$	16,642	$	—		$	93,527
Operating income (loss)	17,408		2,235		1,592		(2		)	21,233
Interest expense, net	5,075		325		7		44			5,451
Utility plant	1,022,525		51,873		4,920		—			1,079,318
Depreciation and amortization expense (1)	9,023		507		261		—			9,791
Income tax expense (benefit)	4,586		854		573		(200		)	5,813
Capital additions	28,141		820		493		—			29,454

(1) Depreciation computed on GSWC’s transportation equipment is recorded in other operating expenses and totaled $61,000 and $175,000 for the three months ended March 31, 2017 and 2016, respectively.

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):

	March 31,
	2017		2016
Total utility plant	$	1,137,159	$	1,079,318
Other assets (2)	343,109		289,573
Total consolidated assets	$	1,480,268	$	1,368,891

(2) As of March 31, 2017, includes assets held for sale related to GSWC's Ojai water system (see Note 8).