Derivatives - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($) Agreement	Apr. 08, 2016 USD ($)
Derivative Instruments [Line Items]
Repayments of Secured Debt	$ 139,843
Estimate increase to interest expense	4,000
Loss on Fair Value Hedge Ineffectiveness	100
Net loss	1,900
Fair value of derivatives in a net liability position	(7,200)
Termination value	$ 7,800
Interest rate swaps [Member]
Derivative Instruments [Line Items]
Number of derivative, interest rate swap agreement | Agreement	21
Derivative, Weighted average interest rate	1.34%
Derivative, notional amount	$ 497,700	$ 130,000
Interest Rate Swap Twelve [Member]
Derivative Instruments [Line Items]
Maturity Date	Jan. 02, 2019
Settled Interest Rate Swaps [Member]
Derivative Instruments [Line Items]
Amortized period	10 years
Subsequent Event [Member] | Interest rate swaps [Member]
Derivative Instruments [Line Items]
Derivative, Weighted average interest rate		1.02%