Equity Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 29, 2014	Jun. 30, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year	$ (10,337)	$ 5,981
Current-period other comprehensive income (loss)	(1,105)	(12,568)
Balance, end of the period	(11,442)	(6,587)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year	(9,803)	7,197
Current-period other comprehensive income (loss)	975	(12,506)
Balance, end of the period	(8,828)	(5,309)
Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year	744	0
Current-period other comprehensive income (loss)	(2,418)	0
Balance, end of the period	(1,674)	0
Pension
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year	(1,278)	(1,216)
Current-period other comprehensive income (loss)	338	(62)
Balance, end of the period	$ (940)	$ (1,278)