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Principal Repayments on Outstanding Term Loan (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Long Term Debt Maturities Repayments Of Principal [Line Items]    
Total Senior Credit Facilities $ 95,811 $ 112,375
Term Loans    
Long Term Debt Maturities Repayments Of Principal [Line Items]    
2016 7,500  
2017 20,000  
Total Senior Credit Facilities $ 27,500