Interest Rate Contracts - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014
Derivative [Line Items]
Number of derivative instruments	2
Interest rate swap agreement, notional amount	$ 60,000,000
Additional amount reclassified from AOCI as an increase to interest expense	98,000
Interest Rate Swap 1
Derivative [Line Items]
Interest rate swap agreement, notional amount	30,000,000
Interest rate swap agreement, effective date	Jan. 15, 2015
Interest rate swap agreement, termination date	Feb. 15, 2019
Interest rate swap, fixed interest rate	3.726%
Interest Rate Swap 2
Derivative [Line Items]
Interest rate swap agreement, notional amount	$ 30,000,000
Interest rate swap agreement, effective date	Jul. 15, 2015
Interest rate swap agreement, termination date	Feb. 15, 2019
Interest rate swap, fixed interest rate	3.91%