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Long-Term Obligations - Summary of Long-Term Obligations (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Debt Instrument [Line Items]    
Unamortized value of debt issuance costs $ (39,374) $ (57,062)
Net carrying value 3,169,672 3,343,063
Less: current maturities (39,709) (24,375)
Long-term obligations 3,129,963 3,318,688
Senior Notes [Member] | 2018 [Member]    
Debt Instrument [Line Items]    
Secured debt 0 1,813,250
Senior Notes [Member] | 2019 [Member]    
Debt Instrument [Line Items]    
Secured debt 8,814 336,875
Senior Notes [Member] | 2021 [Member]    
Debt Instrument [Line Items]    
Secured debt 400,000 0
Senior Notes [Member] | Senior Notes 2022 [Member]    
Debt Instrument [Line Items]    
Senior notes 1,000,000 1,000,000
Senior Notes [Member] | 2023 [Member]    
Debt Instrument [Line Items]    
Secured debt 865,655 0
Accounts Receivable Securitization Facility [Member] | 2018 [Member]    
Debt Instrument [Line Items]    
Secured debt 34,000 0
Senior Secured A Term Loan [Member] | 2021 [Member]    
Debt Instrument [Line Items]    
Secured debt 641,875 0
Senior Secured B Term Loan [Member] | 2021 [Member]    
Debt Instrument [Line Items]    
Secured debt $ 258,702 $ 250,000