Goodwill and Other Intangible Assets (Other Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross	$ 303,223		$ 303,223		$ 293,585
Accumulated Amortization	115,304		115,304		110,919
Net	187,919		187,919		182,666
Amortization expense	2,975	$ 2,911	6,088	$ 5,340
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
2017	17,400		17,400
2018	23,000		23,000
2019	21,900		21,900
2020	21,000		21,000
2021	20,300		20,300
Patents
Finite-Lived Intangible Assets [Line Items]
Gross	18,643		18,643		18,645
Accumulated Amortization	18,625		18,625		18,623
Net	18		18		22
Software
Finite-Lived Intangible Assets [Line Items]
Gross	161,438		161,438		149,587
Accumulated Amortization	28,364		28,364		25,792
Net	133,074		133,074		123,795
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross	7,564		7,564		7,564
Accumulated Amortization	1,731		1,731		1,401
Net	5,833		5,833		6,163
Customer lists and other
Finite-Lived Intangible Assets [Line Items]
Gross	115,578		115,578		117,789
Accumulated Amortization	66,584		66,584		65,103
Net	$ 48,994		$ 48,994		$ 52,686