Schedule of Derivatives (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Derivative [Line Items]
Notional Amount	$ 131,377	$ 21,077
Fair Value, Asset	102	9
Fair Value, Liability	(16)	(239)
Gain	(12)	408	436
Pay fixed interest rate swaps
Derivative [Line Items]
Notional Amount	705	11,721
Fair Value, Liability	(16)	(239)
Gain	152	445	436
Interest rate cap
Derivative [Line Items]
Notional Amount	130,672	9,356
Fair Value, Asset	102	9
Gain	$ (164)	$ (37)