Stockholders' Equity Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016
Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance, beginning of year			$ (63,241)	$ (70,823)
Current-period other comprehensive income (loss)	$ 9,231	$ (2,925)	18,225	12,163
Balance, end of the period	(45,016)	(58,660)	(45,016)	(58,660)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	444	444	1,332	1,332
Interest Expense [Member]
Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Before Tax	723	723	2,170	2,170
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	(279)	(279)	(838)	(838)
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)			16,797	10,887
Balance, end of the period	(43,502)	(55,276)	(43,502)	(55,276)
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)			1,332	1,332
Balance, end of the period	(465)	(2,239)	(465)	(2,239)
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)