Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2016

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)	2016			2015
GSWC
Water Revenue Adjustment Mechanism and Modified Cost Balancing Account	$	47,340		$	45,171
Costs deferred for future recovery on Aerojet case	11,820			12,699
Pensions and other post-retirement obligations (Note 11)	28,118			21,996
Derivative unrealized loss (Note 4)	4,901			7,053
Flow-through taxes, net (Note 10)	20,134			16,176
Low income rate assistance balancing accounts	8,272			8,699
General rate case memorandum accounts	13,929			4,433
Other regulatory assets	17,633			21,235
Various refunds to customers	(5,866		)	(4,766		)
Total	$	146,281		$	132,696