Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jul. 01, 2016	Jun. 30, 2017	Jul. 01, 2016
Defined Benefit Plan Liability
Defined Benefit Plan Liability, Beginning	$ (1,475)	$ (1,179)	$ (1,475)	$ (1,179)
Defined Benefit Plan Liability, Ending	(1,475)	(1,179)	(1,475)	(1,179)
Cash Flow Hedges
Cash Flow Hedges, Beginning	4,112	(1,827)	1,420	(2,392)
Realized gain loss on foreign currency hedges - before tax	(342)	768	744	1,387
Realized gain loss on interest rate swaps - before tax	(238)		(344)
Cash Flow Hedges, End	4,601	(3,746)	4,601	(3,746)
Foreign Currency Translation Adjustment
Foreign Currency Translation Adjustment, Beginning	(9,124)	22,369	(15,660)	3,609
Net foreign currency translation gain (loss)	34,599	(9,701)	41,135	9,059
Foreign Currency Translation Adjustment, End	25,475	12,668	25,475	12,668
Total Pre-Tax Amount
Total Pre-Tax Amount, Beginning	(6,487)	19,363	(15,715)	38
Unrealized loss on cash flow hedges	1,069	(2,687)	2,781	(2,741)
Realized gain loss on foreign currency hedges - before tax	(342)	768	744	1,387
Realized gain loss on interest rate swaps - before tax	(238)		(344)
Net foreign currency translation gain (loss)	34,599	(9,701)	41,135	9,059
Total Pre-Tax Amount, End	28,601	7,743	28,601	7,743
Tax
Tax, Beginning	(1,227)	1,134	(285)	1,332
Unrealized gain (loss) on cash flow hedges	(374)	940	(973)	959
Realized gain loss on foreign currency contracts - tax	120	(268)	(260)	(485)
Realized gain loss on interest rate swap hedges - tax	83		120
Net foreign currency translation gain (loss)	0		0	0
Tax, End	(1,398)	1,806	(1,398)	1,806
Net-of-Tax Amount
Total Net-of-Tax Amount, Beginning	(7,714)	20,497	(16,000)	1,370
Unrealized gain (loss) on cash flow hedges, net of tax	695	(1,747)	1,808	(1,782)
Realized gain loss on foreign currency hedges, net of tax	(222)	500	484	902
Realized gain loss on interest rate swap hedges, net of tax	(155)		(224)
Foreign currency translation gain (loss)	34,599	(9,701)	41,135	9,059
Total Net-of-Tax Amount, End	$ 27,203	$ 9,549	$ 27,203	$ 9,549