v3.8.0.1
Long-Term Debt - Schedule of Long Term Debt (Detail) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 21, 2017
Dec. 31, 2016
May 03, 2016
Jun. 30, 2013
Debt Instrument [Line Items]          
Senior secured credit facility, net $ 289,275   $ 271,696    
Senior notes, net 84,185   226,653    
Total long-term debt 373,460   498,349    
Senior Notes [Member]          
Debt Instrument [Line Items]          
Principal 85,240   230,320    
Debt issuance costs (1,055)   (3,667)    
Senior notes, net 84,185   226,653   $ 250,000
Senior Secured Credit Facility [Member]          
Debt Instrument [Line Items]          
Outstanding borrowings 291,000   273,000    
Debt issuance costs (1,725) $ (1,000) (1,304) $ (200)  
Senior secured credit facility, net $ 289,275   $ 271,696