Debt - Summary of Debt and Capital Lease Obligations (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Total Debt	$ 1,560,667	$ 1,502,554
$200 Million Term Loan A [Member]
Debt Instrument [Line Items]
Total Debt	198,282
$500 Million Term Loan B [Member]
Debt Instrument [Line Items]
Total Debt	490,638
$400 Million Term Loan B [Member]
Debt Instrument [Line Items]
Total Debt		384,727
$350 Million 5% Senior Notes [Member]
Debt Instrument [Line Items]
Total Debt	346,207	345,754
$400 Million 5% Senior Notes [Member]
Debt Instrument [Line Items]
Total Debt	394,676	394,281
$700 Million Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Total Debt	130,214	377,133
Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Total Debt	$ 650	$ 659