Derivatives - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
	Jul. 13, 2016	Jun. 30, 2016	Jun. 30, 2016	Jun. 30, 2015
Derivative Instruments [Line Items]
Repayments of Secured Debt			$ 280,327	$ 139,137
Estimate increase to interest expense		$ 5,100	5,100
Loss on Fair Value Hedge Ineffectiveness		100
Carrying Value Of Net Losses Associated With Interest Rate Swaps		1,800	1,800
Fair value of derivatives in a net liability position		(10,300)	(10,300)
Termination value		$ 10,900	$ 10,900
Interest rate swaps [Member]
Derivative Instruments [Line Items]
Number of derivative, interest rate swap agreement		26	26
Derivative, Weighted average interest rate		1.27%	1.27%
Derivative, notional amount		$ 627,700	$ 627,700
Interest Rate Swap Member Forward Starting [Member]
Derivative Instruments [Line Items]
Number of derivative, interest rate swap agreement		1	1
Derivative, Weighted average interest rate		1.42%	1.42%
Derivative, notional amount		$ 48,000	$ 48,000
Maturity Date		Feb. 01, 2021
Interest Rate Swap Twelve [Member]
Derivative Instruments [Line Items]
Maturity Date			Jan. 02, 2019
Settled Interest Rate Swaps [Member]
Derivative Instruments [Line Items]
Amortization Period of Deferred Gain (Loss) on Discontinuation of Fair Value Hedge			10 years
Subsequent Event [Member] | Interest rate swaps [Member]
Derivative Instruments [Line Items]
Derivative, Weighted average interest rate	0.70%
Derivative, notional amount	$ 25,000
Maturity Date	Jan. 02, 2019