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Long-term Debt - Obligations Additional Information (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Debt Instrument [Line Items]    
Debt issuance costs $ 4,583 $ 5,137
Revolving credit facility [Member] | Other assets [Member]    
Debt Instrument [Line Items]    
Debt issuance costs 700 $ 1,200
Senior notes [Member] | Senior secured third-priority lien notes (maturing May 15, 2018) [Member]    
Debt Instrument [Line Items]    
Senior secured third-priority lien notes reclassified from long-term to current $ 28,500