Stockholders' Equity Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 02, 2017	Apr. 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)	2,486	13,121
Balance, end of the period	(60,755)	(57,702)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	445	445
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
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	(278)	(278)
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)	1,945	12,676
Balance, end of the period	(58,354)	(53,487)
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)	445	445
Balance, end of the period	(1,352)	(3,126)
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	0
Balance, end of the period	$ (1,049)	$ (1,089)