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Long-Term Debt - 2013 Senior Credit Facility (Details)
1 Months Ended 3 Months Ended 12 Months Ended
Nov. 15, 2013
USD ($)
Dec. 31, 2015
USD ($)
Nov. 30, 2014
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Debt And Credit Facility [Line Items]              
Loss on extinguishment of debt   $ 17,911,000   $ 17,911,000 $ 17,911,000 $ (493,000) $ (750,000)
Line of Credit [Member] | 2013 Senior Credit Facility [Member]              
Debt And Credit Facility [Line Items]              
Line of credit maximum borrowing capacity $ 370,000,000            
Covenant compliance, maximum percentage available on line of credit due to exceeded maximum leverage ratio 25.00%            
Threshold from sale of assets used towards mandatory prepayments $ 30,000,000            
Proceeds from sale of assets         $ 43,500,000    
Line of Credit [Member] | 2013 Senior Credit Facility [Member] | Leverage Ratio, Greater Than 2.50 [Member]              
Debt And Credit Facility [Line Items]              
Covenant compliance, maximum leverage ratio   2.50   2.50 2.50    
Excess cash flow repayment percentage   50.00%   50.00% 50.00%    
Line of Credit [Member] | 2013 Senior Credit Facility [Member] | Leverage Ratio, Greater than 2.00 but Less than 2.50 [Member]              
Debt And Credit Facility [Line Items]              
Covenant compliance, maximum leverage ratio   2.00   2.00 2.00    
Excess cash flow repayment percentage   25.00%   25.00% 25.00%    
Line of Credit [Member] | 2013 Senior Credit Facility [Member] | Leverage Ratio, Less Than or Equal to 2.00 [Member]              
Debt And Credit Facility [Line Items]              
Excess cash flow repayment percentage   0.00%   0.00% 0.00%    
Line of Credit [Member] | 2013 Senior Credit Facility [Member] | Base Rate [Member]              
Debt And Credit Facility [Line Items]              
Debt basis spread on variable rate (as percent) 2.50%            
Line of Credit [Member] | 2013 Senior Credit Facility [Member] | LIBOR [Member]              
Debt And Credit Facility [Line Items]              
Debt basis spread on variable rate (as percent) 3.50%            
Secured Debt [Member] | 2013 Senior Credit Facility [Member]              
Debt And Credit Facility [Line Items]              
Deferred debt issuance costs $ 5,119,000            
Additional debt discount due to creditor fees 4,356,000            
Secured Debt [Member] | 2013 Term Loan Facility Maturing November 15, 2020 [Member]              
Debt And Credit Facility [Line Items]              
Long-term debt, gross 325,000,000 $ 275,417,000   $ 275,417,000 $ 275,417,000 308,284,000  
Proceeds from issuance of secured debt $ 323,375,000            
Debt Instrument, Discount Percentage 0.50%            
Debt unamortized discount $ 1,625,000 6,418,000   6,418,000 $ 6,418,000 8,413,000  
Percent of amendment fee paid to consenting lenders         0.25%    
Repayment of term loan         $ 19,754,000    
Write-off of unamortized debt issuance cost           119,000  
Debt mandatory prepayment from sale of assets     $ 13,500,000        
Write-off of unamortized original issue discount           $ 374,000  
Debt Instrument, Term After Which Excess Cash Flow is Paid         95 days    
Long-term debt   268,999,000   268,999,000 $ 268,999,000    
Unamortized debt issuance costs   2,991,000   2,991,000 2,991,000    
Secured Debt [Member] | 2013 Term Loan Facility Maturing November 15, 2020 [Member] | Base Rate [Member]              
Debt And Credit Facility [Line Items]              
Debt Instrument, Variable Rate Floor 2.00%            
Secured Debt [Member] | 2013 Term Loan Facility Maturing November 15, 2020 [Member] | LIBOR [Member]              
Debt And Credit Facility [Line Items]              
Debt Instrument, Variable Rate Floor 1.00%            
Revolving Credit Facility [Member] | 2013 Senior Credit Facility [Member]              
Debt And Credit Facility [Line Items]              
Repurchase face amount   29,829,000   29,829,000 29,829,000    
Repurchase amount   10,947,000   $ 10,947,000 $ 10,947,000    
Write-off of unamortized debt issuance cost   249,000          
Write-off of debt discount   $ 707,000          
Revolving Credit Facility [Member] | 2013 Revolving Loan Facility Maturing November 15, 2018 [Member]              
Debt And Credit Facility [Line Items]              
Line of credit maximum borrowing capacity $ 45,000,000            
Covenant compliance, maximum percentage available on line of credit due to exceeded maximum leverage ratio         25.00%    
Covenant compliance, maximum leverage ratio   4.50   4.50 4.50    
Unused borrowing capacity   $ 42,149,000   $ 42,149,000 $ 42,149,000    
Unused borrowing capacity based on leverage ratio   11,250,000   11,250,000 11,250,000    
Letter of Credit [Member] | 2013 Senior Credit Facility [Member]              
Debt And Credit Facility [Line Items]              
Line of credit maximum borrowing capacity $ 5,500,000            
Letter of Credit [Member] | 2013 Revolving Loan Facility Maturing November 15, 2018 [Member]              
Debt And Credit Facility [Line Items]              
Letters of credit outstanding   $ 2,851,000   $ 2,851,000 $ 2,851,000