Derivative Financial Instruments - Schedule of Derivatives (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Derivative [Line Items]
Notional Amount	$ 181,249		$ 181,249		$ 131,377
Fair Value Asset	328		328		102
Fair Value Liability	(15)		(15)		(16)
Other (loss) income	(262)	46	(169)	156
Pay Fixed Interest Rate Swaps [Member]
Derivative [Line Items]
Notional Amount	695		695		705
Fair Value Liability	(15)		(15)		(16)
Other (loss) income	(1)	44	1	152
Interest Rate Caps [Member]
Derivative [Line Items]
Notional Amount	180,554		180,554		130,672
Fair Value Asset	328		328		102
Other (loss) income	$ (261)	$ 2	$ (170)	$ 4