Long-Term Debt - Additional Information (Detail) - USD ($)	1 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2016	Dec. 31, 2015	Aug. 30, 2012
Debt Instrument [Line Items]
Extinguishment of outstanding term loan	$ 663,188,000
Acceleration amortization of debt issuance cost	$ 10,050,000
Margin over LIBOR	1.50%	1.50%	1.50%
LIBOR floor rate			0.75%
Term loan amounts outstanding		$ 737,333,000	$ 776,466,000
Debt amortization expense		2,667,000	$ 3,534,000
Principal amount of term loan		$ 10,000,000
Credit facility, frequency of payments		Quarterly
Maturity date of term loan agreement		Jun. 30, 2020
New Credit Facility
Debt Instrument [Line Items]
Margin over LIBOR	1.50%
Credit facility, base rate	0.50%
Term Loan Credit Facility | New Credit Facility
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity	$ 800,000,000
Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity		$ 350,000,000		$ 250,000,000
Acceleration amortization of debt issuance cost	65,000
Revolving Credit Facility | New Credit Facility
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity	$ 350,000,000