Taxes on Income (Tables)

12 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Schedule of significant components of the deferred tax assets and liabilities from continuing operations

The significant components of the deferred tax assets and liabilities as reflected in the balance sheets at December 31, 2017 and 2016 are:

	AWR						GSWC
	December 31,						December 31,
(dollars in thousands)	2017			2016			2017			2016
Deferred tax assets:
Regulatory-liability-related: ITC and excess deferred taxes (1)	$	32,761		$	903		$	32,761		$	903
Regulatory-liability-related: California Corp Franchise Tax	1,806			3,365			1,806			3,365
Other nonproperty-related	2,509			1,993			2,230			1,901
Contributions and advances	4,679			7,464			5,022			7,712
	$	41,755		$	13,725		$	41,819		$	13,881
Deferred tax liabilities:
Fixed assets	$	(130,115	)	$	(200,378	)	$	(134,437	)	$	(203,133	)
Regulatory-asset-related: depreciation and other	(16,851		)	(24,402		)	(16,851		)	(24,402		)
California Corp Franchise Tax	(528		)	(2,033		)	(552		)	(2,208		)
Other property-related	(47		)	—			(53		)	(68		)
Balancing and memorandum accounts	(7,311		)	(7,010		)	(7,897		)	(7,271		)
Deferred charges	(2,594		)	(4,429		)	(2,809		)	(4,597		)
	(157,446		)	(238,252		)	(162,599		)	(241,679		)
Accumulated deferred income taxes - net	$	(115,691	)	$	(224,527	)	$	(120,780	)	$	(227,798	)

Schedule of current and deferred components of income tax expense from continuing operations

The current and deferred components of income tax expense are as follows:

	AWR
	Year Ended December 31,
(dollars in thousands)	2017		2016		2015
Current
Federal	$	20,978	$	2,297	$	21,866
State	5,844		4,798		5,442
Total current tax expense	$	26,822	$	7,095	$	27,308
Deferred
Federal	$	11,543	$	26,715	$	8,948
State	609		925		1,475
Total deferred tax expense	12,152		27,640		10,423
Total income tax expense	$	38,974	$	34,735	$	37,731

	GSWC
	Year Ended December 31,
(dollars in thousands)	2017		2016			2015
Current
Federal	$	15,044	$	(3,115	)	$	16,196
State	5,045		3,625			5,557
Total current tax expense	$	20,089	$	510		$	21,753
Deferred
Federal	$	11,770	$	25,864		$	8,536
State	2,200		2,235			2,183
Total deferred tax expense	13,970		28,099			10,719
Total income tax expense	$	34,059	$	28,609		$	32,472

Schedule of reconciliations of the effective tax rates to the federal statutory rate

The reconciliations of the effective tax rates to the federal statutory rate are as follows:

	AWR
	Year Ended December 31,
(dollars in thousands, except percent)	2017			2016			2015
Federal taxes on pretax income at statutory rate	$	37,919		$	33,067		$	34,375
Increase (decrease) in taxes resulting from:
State income tax, net of federal benefit	4,382			3,029			4,843
Change in tax rate	(82		)	—			—
Flow-through on fixed assets	845			994			626
Flow-through on pension costs	412			(247		)	267
Flow-through on removal costs	(1,980		)	(2,068		)	(929		)
Domestic production activities deduction	(1,421		)	(78		)	(1,560		)
Investment tax credit	(93		)	(83		)	(88		)
Other – net	(1,008		)	121			197
Total income tax expense from operations	$	38,974		$	34,735		$	37,731
Pretax income from operations	$	108,341		$	94,478		$	98,215
Effective income tax rate	36.0		%	36.8		%	38.4		%

	GSWC
	Year Ended December 31,
(dollars in thousands, except percent)	2017			2016			2015
Federal taxes on pretax income at statutory rate	$	30,736		$	26,452		$	28,022
Increase (decrease) in taxes resulting from:
State income tax, net of federal benefit	4,924			3,118			5,151
Change in tax rate	1,063			—			—
Flow-through on fixed assets	845			994			626
Flow-through on pension costs	412			(247		)	267
Flow-through on removal costs	(1,980		)	(2,068		)	(929		)
Domestic production activities deduction	(1,148		)	—			(1,268		)
Investment tax credit	(93		)	(82		)	(88		)
Other – net	(700		)	442			691
Total income tax expense from operations	$	34,059		$	28,609		$	32,472
Pretax income from operations	$	87,816		$	75,578		$	80,063
Effective income tax rate	38.8		%	37.9		%	40.6		%