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Long-Term Debt - Schedule of Long-Term Debt (Details) - USD ($)
Dec. 31, 2016
Dec. 31, 2015
Nov. 15, 2013
Debt Instrument [Line Items]      
Less: Current portion due within one year $ (2,082,000) $ (2,810,000)  
Long-term portion 194,743,000 263,930,000  
Secured Debt [Member] | 2013 Term Loan Facility Maturing November 15, 2020 [Member]      
Debt Instrument [Line Items]      
2013 Term Loan Facility 202,000,000 275,417,000 $ 325,000,000
Less: Unamortized discount (3,851,000) (6,418,000) $ (1,625,000)
Less: Deferred financing costs (1,324,000) (2,259,000)  
Less: Current portion due within one year (2,082,000) (2,810,000)  
Long-term portion $ 194,743,000 $ 263,930,000