Derivatives - Schedule of Effects of Derivative Instruments Net of Taxes on Other Comprehensive Income (Loss) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Derivative [Line Items]
Derivatives in Cash Flow Hedging Relationships	$ 208	$ (2,108)
Foreign Exchange Contract [Member]
Derivative [Line Items]
Derivatives in Cash Flow Hedging Relationships	208	(2,108)
Derivatives in Cash Flow Hedging Relationships	$ 1,683	$ 577
Income Statement Location	Cost of revenue

Amount after tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

+ References+ Details