Business Segments: (Tables)

9 Months Ended

Sep. 30, 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- and third-party contractor-funded capital expenditures for ASUS and property installed by developers and conveyed to GSWC.

	As Of And For The Three Months Ended September 30, 2017
	GSWC						AWR			Consolidated
(dollars in thousands)	Water		Electric		ASUS		Parent			AWR
Operating revenues	$	91,919	$	7,994	$	24,505	$	—		$	124,418
Operating income (loss)	31,473		1,595		5,502		(3		)	38,567
Interest expense, net	4,974		346		58		76			5,454
Utility plant	1,117,674		57,669		6,273		—			1,181,616
Depreciation and amortization expense (1)	8,972		537		345		—			9,854
Income tax expense (benefit)	10,544		269		1,944		(249		)	12,508
Capital additions	30,536		559		905		—			32,000

	As Of And For The Three Months Ended September 30, 2016
	GSWC						AWR			Consolidated
(dollars in thousands)	Water		Electric		ASUS		Parent			AWR
Operating revenues	$	90,617	$	8,146	$	25,043	$	—		$	123,806
Operating income (loss)	32,642		1,500		5,487		(12		)	39,617
Interest expense, net	5,145		328		12		39			5,524
Utility plant	1,068,048		54,880		5,660		—			1,128,588
Depreciation and amortization expense (1)	8,734		506		246		—			9,486
Income tax expense (benefit)	10,575		466		1,951		(284		)	12,708
Capital additions	32,655		1,290		628		—			34,573

	As Of And For The Nine Months Ended September 30, 2017
	GSWC						AWR			Consolidated
(dollars in thousands)	Water		Electric		ASUS		Parent			AWR
Operating revenues	$	239,057	$	26,108	$	71,258	$	—		$	336,423
Operating income (loss)	84,289		5,935		14,907		(10		)	105,121
Interest expense, net	14,924		1,071		214		197			16,406
Utility plant	1,117,674		57,669		6,273		—			1,181,616
Depreciation and amortization expense (1)	26,731		1,610		843		—			29,184
Income tax expense (benefit)	27,739		1,496		5,152		(717		)	33,670
Capital additions	74,113		2,260		1,523		—			77,896

	As Of And For The Nine Months Ended September 30, 2016
	GSWC						AWR			Consolidated
(dollars in thousands)	Water		Electric		ASUS		Parent			AWR
Operating revenues	$	237,987	$	26,420	$	64,880	$	—		$	329,287
Operating income (loss)	76,502		4,840		11,298		(16		)	92,624
Interest expense, net	15,272		997		29		90			16,388
Utility plant	1,068,048		54,880		5,660		—			1,128,588
Depreciation and amortization expense (1)	26,597		1,520		761		—			28,878
Income tax expense (benefit)	23,528		1,675		4,029		(655		)	28,577
Capital additions	93,189		4,972		1,746		—			99,907

(1) Depreciation computed on GSWC’s transportation equipment is recorded in other operating expenses and totaled $61,000 and $68,000 for the three months ended September 30, 2017 and 2016, respectively, and $181,000 and $202,000 for the nine months ended September 30, 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 ratemaking) to total consolidated assets (in thousands):

	September 30,
	2017		2016
Total utility plant	$	1,181,616	$	1,128,588
Other assets	304,870		311,798
Total consolidated assets	$	1,486,486	$	1,440,386