Borrowing Arrangements - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Term loan	$ 199,379,000	$ 199,172,000
Line of credit facility, maximum borrowing capacity	400,000,000	400,000,000.0
Line of credit facility, additional borrowing capacity	$ 100,000,000	100,000,000.0
Line of credit facility, expiration date	Jul. 17, 2018
Line of credit facility potential term extension period (in years)	1 year
Commitment fee		3,500,000
Term Loans
Debt Instrument [Line Items]
Term loan	$ 200,000,000
Debt instrument, maturity date	Jan. 10, 2020
Derivative, maturity years (in years)	3 years
Minimum
Debt Instrument [Line Items]
Interest rate additional above LIBOR (in percentage)	1.20%
Interest rate during period (in percentage)	0.20%
Minimum | Term Loans
Debt Instrument [Line Items]
Interest rate additional above LIBOR (in percentage)	1.35%
Maximum
Debt Instrument [Line Items]
Interest rate additional above LIBOR (in percentage)	1.65%
Interest rate during period (in percentage)	0.35%
Maximum | Term Loans
Debt Instrument [Line Items]
Interest rate additional above LIBOR (in percentage)	1.95%
Mortgages Notes Payable | Adjustments for New Accounting Pronouncement
Debt Instrument [Line Items]
Debt issuance costs		(18,900,000)
Term Loan | Adjustments for New Accounting Pronouncement
Debt Instrument [Line Items]
Debt issuance costs		(800,000)
Escrow Deposits, Goodwill and other Assets | Adjustments for New Accounting Pronouncement
Debt Instrument [Line Items]
Debt issuance costs		$ 3,700,000