Goodwill and Other Intangible Assets (Other Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross	$ 282,848		$ 282,848		$ 293,585
Accumulated Amortization	97,034		97,034		110,919
Net	185,814		185,814		182,666
Amortization expense	4,404	$ 3,235	10,492	$ 8,575
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
2017	16,400		16,400
2018	23,200		23,200
2019	22,100		22,100
2020	21,200		21,200
2021	20,500		20,500
Patents
Finite-Lived Intangible Assets [Line Items]
Gross	40		40		18,645
Accumulated Amortization	24		24		18,623
Net	16		16		22
Software
Finite-Lived Intangible Assets [Line Items]
Gross	163,741		163,741		149,587
Accumulated Amortization	31,022		31,022		25,792
Net	132,719		132,719		123,795
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross	7,564		7,564		7,564
Accumulated Amortization	1,896		1,896		1,401
Net	5,668		5,668		6,163
Customer lists and other
Finite-Lived Intangible Assets [Line Items]
Gross	111,503		111,503		117,789
Accumulated Amortization	64,092		64,092		65,103
Net	$ 47,411		$ 47,411		$ 52,686