Derivative Instruments and Hedging Activities (Detail) (USD $) In Thousands, unless otherwise specified			1 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Oct. 31, 2013 Interest Rate Swap Agreement
Derivative [Line Items]
Interest rate swap agreement, term			10 years
Notional amount	$ 11,690	$ 14,841	$ 3,500