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Long-Term Debt - Maturity Table (Details) - Secured Debt [Member] - 2013 Term Loan Facility Maturing November 15, 2020 [Member] - USD ($)
Dec. 31, 2015
Dec. 31, 2014
Nov. 15, 2013
Long-term Debt, Fiscal Year Maturity [Abstract]      
2016 $ 2,810,000    
2017 2,810,000    
2018 2,810,000    
2019 2,810,000    
2020 2,810,000    
2021 and thereafter 261,367,000    
Total debt $ 275,417,000 $ 308,284,000 $ 325,000,000