Fair Value Gain of Derivatives (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Derivative [Line Items]
Notional Amount	$ 28,627	$ 56,087
Fair Value	(137)	(34)
Not Designated as Hedges under ASC 815 | Prepaid and other | Foreign currency exchange forwards
Derivative [Line Items]
Notional Amount	8,664	15,604
Maturity Dates	2013-07	2013-01
Fair Value	14	36
Not Designated as Hedges under ASC 815 | Accrued expenses and other current liabilities | Foreign currency exchange forwards
Derivative [Line Items]
Notional Amount	19,963	40,483
Maturity Dates	2013-07	2013-01
Fair Value	$ (151)	$ (70)