Derivative Financial Instruments - Schedule of Derivatives (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Derivatives
Notional Amount	$ 275,547		$ 303,639
Interest rate cap assets	75		164
Interest rate swap liabilities	(2,250)		(1,082)
Change in fair value of interest rate derivatives
Change in fair value of interest rate derivatives	(2,389)	$ (147)
Unrealized gain (loss) on cash flow hedge		(786)
Total change in fair value	(2,389)	(933)
Interest Rate Swaps
Derivatives
Notional Amount	57,047		57,093
Interest rate swap liabilities	(2,250)		(1,082)
Change in fair value of interest rate derivatives
Total change in fair value	(2,244)	(787)
Interest Rate Caps
Derivatives
Notional Amount	218,500		246,546
Interest rate cap assets	75		$ 164
Change in fair value of interest rate derivatives
Total change in fair value	$ (145)	$ (146)