XML 48 R37.htm IDEA: XBRL DOCUMENT v3.10.0.1
Long-Term Debt - Schedule of Revolving Credit Facility and Long-Term Debt (Detail) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Debt Instrument [Line Items]    
Unamortized discount and debt issuance costs $ (16,670) $ (4,689)
Long-term debt 416,363 409,399
Less current portion of long-term debt, net 12,899 9,146
Long-term debt due after one year, net 403,464 400,253
Senior Secured Notes due 2023 [Member]    
Debt Instrument [Line Items]    
Debt carrying amount 400,000  
Senior Secured Notes due 2019 [Member]    
Debt Instrument [Line Items]    
Debt carrying amount   375,000
5.73% Secured Promissory Note Due 2019 [Member]    
Debt Instrument [Line Items]    
Debt carrying amount 7,662 8,167
5.25% Secured Promissory Note Due 2021 [Member]    
Debt Instrument [Line Items]    
Debt carrying amount 9,696 11,262
6.25% Secured Promissory Note Due 2023 [Member]    
Debt Instrument [Line Items]    
Debt carrying amount $ 15,675 16,665
Other [Member]    
Debt Instrument [Line Items]    
Debt carrying amount   $ 2,994