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Fair Value (Details) (USD $)
Mar. 31, 2013
Dec. 31, 2012
Fair Value [Member]
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fixed rate long-term debt $ 20,155,000 $ 22,425,000
Carrying Value [Member]
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fixed rate long-term debt 20,324,000 22,608,000
Debt discount $ 726,000 $ 917,000