Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 03, 2015
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ (16,456)
Other comprehensive income (loss)	(3,994)
Amounts reclassified from other comprehensive income (loss)	217	[1]
Ending Balance	(20,233)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(5,615)
Other comprehensive income (loss)	(4,506)
Ending Balance	(10,121)
Pension liability
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(10,841)
Other comprehensive income (loss)	512
Amounts reclassified from other comprehensive income (loss)	217	[1]
Ending Balance	$ (10,112)

[1] The amounts reclassified from other comprehensive income (loss) were included in selling, general and administrative expenses in the consolidated statements of operations.