Derivatives and Hedging Activities - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Derivatives not qualified as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in income, net	$ 112	$ 112	$ 43
Derivatives designated as cash flow hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in income, net	$ 515	$ 195	$ 183