Stockholders' Equity Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2017	Jul. 03, 2016	Jul. 02, 2017	Jul. 03, 2016
Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance, beginning of year			$ (63,241)	$ (70,823)
Current-period other comprehensive income (loss)	$ 6,508	$ 1,967	8,994	15,088
Balance, end of the period	(54,247)	(55,735)	(54,247)	(55,735)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	443	443	888	888
Interest Expense [Member]
Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Before Tax	724	724	1,447	1,447
Provision for income taxes [Member]
Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	(281)	(281)	(559)	(559)
Foreign Currency Translation
Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance, beginning of year			(60,299)	(66,163)
Current-period other comprehensive income (loss)			8,010	14,256
Balance, end of the period	(52,289)	(51,907)	(52,289)	(51,907)
Cash Flow Hedges
Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance, beginning of year			(1,797)	(3,571)
Current-period other comprehensive income (loss)			888	888
Balance, end of the period	(909)	(2,683)	(909)	(2,683)
Pension
Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance, beginning of year			(1,145)	(1,089)
Current-period other comprehensive income (loss)			96	(56)
Balance, end of the period	$ (1,049)	$ (1,145)	$ (1,049)	$ (1,145)