Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of December 31, 2012	$ 159,733
Current period other comprehensive income (loss) before reclassifications	(77,491)
Amounts reclassified from accumulated other comprehensive income (loss)	0
Balance as of March 30, 2013	82,242
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of December 31, 2012	160,661
Current period other comprehensive income (loss) before reclassifications	(77,706)
Amounts reclassified from accumulated other comprehensive income (loss)	0
Balance as of March 30, 2013	82,955
Pensions
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of December 31, 2012	(928)	[1]
Current period other comprehensive income (loss) before reclassifications	215	[1]
Amounts reclassified from accumulated other comprehensive income (loss)	0	[1]
Balance as of March 30, 2013	$ (713)	[1]

[1] This accumulated other comprehensive income (loss) component is included in the computation of net periodic pension cost (refer to Note 11 to the consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2012).