Change in Fair Value of Forward Contracts Recorded in Other (Expense) Income, Net (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Derivative Instruments and Hedging Activities Disclosures [Line Items]
(Loss) gain included in other (expense) income, net	$ (95)	$ 244	$ 743	$ (596)