Derivatives and Hedging Activities - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014 Derivative	Mar. 31, 2013
Derivative [Line Items]
Net loss in interest expense related to hedge ineffectiveness	$ (10,000)
Termination value of derivatives in net liability position	200,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional amount of interest rate swaps	6,800,000
Number of interest rate swaps	1
Interest Rate Swap [Member] | Derivatives not Designated as Hedging Instruments [Member]
Derivative [Line Items]
Notional amount of interest rate swaps	333,500,000
Number of interest rate swaps	26
Derivatives designated and not designated as hedging instruments	$ (83,000)	$ 106,000