Derivative Financial Instruments - Schedule of Derivatives (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Derivative [Line Items]
Notional Amount	$ 181,314		$ 131,377
Fair Value Asset	589		102
Fair Value Liability	(14)		(16)
Gain	93	110
Pay Fixed Interest Rate Swaps [Member]
Derivative [Line Items]
Notional Amount	700		705
Fair Value Liability	(14)		(16)
Gain	2	108
Interest Rate Caps [Member]
Derivative [Line Items]
Notional Amount	180,614		130,672
Fair Value Asset	589		102
Gain	$ 91	$ 2