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Regulatory Matters: (Tables)
 6 Months Ended
Jun. 30, 2014
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:
 
(dollars in thousands)
 
June 30,
2014
 
December 31,
2013
GSWC
 
 
 
 
Water Revenue Adjustment Mechanism, net of Modified Cost Balancing Account
 
$
17,543

 
$
16,345

Base Revenue Requirement Adjustment Mechanism
 
9,966

 
8,725

Costs deferred for future recovery on Aerojet case
 
14,302

 
14,763

Pensions and other post-retirement obligations (Note 6)
 
18,568

 
20,241

Flow-through taxes, net (Note 5)
 
16,201

 
16,189

Low income rate assistance balancing accounts
 
9,747

 
9,979

General rate case memorandum accounts
 
9,868

 
15,645

Other regulatory assets
 
20,066

 
25,086

Various refunds to customers
 
(2,956
)
 
(4,292
)
Total
 
$
113,305

 
$
122,681