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Fair Value (Details) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Debt discount $ 2,108,000    
Amortization of deferred financing cost and debt discount 979,000,000 $ 1,220,000,000 $ 893,000,000
Fair Value [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Fixed rate long-term debt 16,844,000 25,206,000  
Carrying Value [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Fixed rate long-term debt 16,681,000 25,373,000  
Debt discount $ 2,108,000 $ 1,459,000