Schedule of Aggregate Principal Maturities of Long-term Debt (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Feb. 10, 2016
Debt Disclosure [Abstract]    
2017 $ 1,430  
2018 1,430  
2019 138,710  
2020 76,125  
Thereafter 2,775,628  
Total debt [1] 2,993,323  
Current maturities of long-term debt (1,430) $ (1,430)
Future amortization of note discounts (103,695)  
Future amortization of financing costs (1,873)  
Future PIK interest (2,018,953)  
Long-term debt $ 867,372 $ 818,525
[1] Excludes original issuance discount of $103.7 million on the Convertible Notes and financing costs of $1.9 million on the 10% Second Lien Notes.