Derivative Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Derivatives, Fair Value [Line Items]
Derivative asset, fair value	$ 6,710	$ 2,310	$ 10,868
Derivative liability, fair value	18,227	14,613	4,904
Designated As Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative asset, fair value	3,490	415	10,868
Derivative liability, fair value	10,530	12,902	3,664
Designated As Hedging Instrument | Foreign Exchange Forward | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Derivative asset, fair value	3,183	415	10,868
Designated As Hedging Instrument | Foreign Exchange Forward | Other noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative asset, fair value	307
Designated As Hedging Instrument | Foreign Exchange Forward | Accrued liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	10,514	12,432	3,664
Designated As Hedging Instrument | Foreign Exchange Forward | Other noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	16	470
Not Designated As Hedging Instrument | Foreign Exchange Forward | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Derivative asset, fair value	3,220	1,895
Not Designated As Hedging Instrument | Foreign Exchange Forward | Accrued liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	$ 7,697	$ 1,711	$ 1,240