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Debt - Annual Maturities of Long-Term Debt Excluding Capital Lease Obligations (Detail)
$ in Thousands
Dec. 31, 2016
USD ($)
Debt Instrument [Line Items]  
2017 $ 0
2018 0
2019 382,400
2020 0
2021 740,000
Years thereafter 400,000
Total 1,522,400
$400 Million Term Loan B [Member]  
Debt Instrument [Line Items]  
2017 0
2018 0
2020 0
2021 390,000
Total 390,000
$350 Million 5% Senior Notes [Member]  
Debt Instrument [Line Items]  
2017 0
2018 0
2020 0
2021 350,000
Total 350,000
$400 Million 5% Senior Notes [Member]  
Debt Instrument [Line Items]  
2017 0
2018 0
2020 0
Years thereafter 400,000
Total 400,000
Credit Facility [Member]  
Debt Instrument [Line Items]  
2017 0
2018 0
2019 382,400
2020 0
Total $ 382,400