Derivative Instruments - Forward Contract Amounts Recorded in Consolidated Balance Sheet (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2013	Dec. 31, 2012
Derivatives, Fair Value [Line Items]
Total Assets	$ 2,578	$ 0
Total Liabilities	0	2,045
Prepaid Expenses and Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Total Assets	2,578	0
Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total Liabilities	$ 0	$ 2,045