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Regulatory Matters (Tables)
 12 Months Ended
Dec. 31, 2013
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)
 
2013
 
2012
GSWC
 
 

 
 

Water Revenue Adjustment Mechanism, net of Modified Cost Balancing Account
 
$
16,345

 
$
42,574

Base Revenue Requirement Adjustment Mechanism
 
8,725

 
6,833

Costs deferred for future recovery on Aerojet case
 
14,763

 
16,030

Pensions and other post-retirement obligations (Note 11)
 
20,241

 
56,894

Derivative unrealized loss (Note 4)
 
—

 
3,060

Flow-through taxes, net (Note 10)
 
16,189

 
16,415

Low income rate assistance balancing accounts
 
9,979

 
9,119

General rate case memorandum accounts
 
15,645

 
4,495

Other regulatory assets
 
25,086

 
28,153

Various refunds to customers
 
(4,292
)
 
(7,558
)
Total
 
$
122,681

 
$
176,015