Derivative Financial Instruments - Schedule of Derivatives (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Derivatives
Notional Amount	$ 303,639	$ 181,119
Fair Value Asset	164	260
Fair Value Liability	(1,082)	(11)
Change in fair value gain (loss)	(1,304)	(233)	$ (12)
Other income (loss)
Derivatives
Change in fair value gain (loss)	(229)	(233)	(12)
Unrealized gain (Loss) on cash flow hedge
Derivatives
Change in fair value gain (loss)	(1,075)
Pay Fixed Interest Rate Swaps [Member]
Derivatives
Notional Amount	57,093	685
Fair Value Liability	(1,082)	(11)
Change in fair value gain (loss)	(1,071)	5	152
Interest Rate Caps [Member]
Derivatives
Notional Amount	246,546	180,434
Fair Value Asset	164	260
Change in fair value gain (loss)	$ (233)	$ (238)	$ (164)