Goodwill and Other Intangible Assets Acquisition information (Details) - USD ($) $ in Thousands		3 Months Ended
	Dec. 10, 2015	Apr. 03, 2016	Dec. 31, 2015	Mar. 29, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Goodwill		$ 258,240	$ 145,607	$ 166,923	$ 170,773
DCG Systems [Member] [Member]
Business Acquisition [Line Items]
Percentage of Voting Interests Acquired	100.00%
Consideration Transferred, Net of Cash Acquired	$ 161,800
Consideration Transferred	182,226
Transaction Costs			$ 3,300
Goodwill		108,002
Revenue		13,800
Net Income (Loss)		$ (1,800)
Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	$ 42,724
Customer Relationships | DCG Systems [Member] [Member]
Business Acquisition [Line Items]
Estimated Useful Life		10 years