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Long-Term Debt (Details 3) (USD $)
 12 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
GSWC
Dec. 31, 2012
GSWC
Dec. 31, 2011
GSWC
Dec. 31, 2013
GSWC
American Recovery and Reinvestment Act Obligation due 2033
Oct. 31, 2009
GSWC
American Recovery and Reinvestment Act Obligation due 2033
Dec. 31, 2013
GSWC
American Recovery and Reinvestment Act Obligation due 2033
Letters of credit to CDHP
Long-term debt                  
Maximum amount of loan that can be borrowed               $ 9,000,000.0  
Interest rate (as a percent)             2.50%    
Maturity term             20 years    
Letters of credit issued, percentage of maximum available under facility                 80.00%
Loan proceeds received for reimbursement of costs of conversion 60,000 3,408,000 61,912,000 60,000 3,408,000 61,912,000 8,600,000    
Amount of debt issued                 $ 7,200,000.0