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Effects of Foreign Currency Collar Designated as Cash Flow Hedges (Detail) (Cash Flow Hedging, Foreign Currency Collar, USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Cash Flow Hedging \| Foreign Currency Collar
Fair Value, Option, Quantitative Disclosures [Line Items]
Loss recognized in other comprehensive income (loss) - effective portion	$ (3,722)

- Definition

The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

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