Goodwill and Other Intangible Assets Purchase Price Allocation (Details) - USD ($) $ in Thousands		3 Months Ended
	Dec. 10, 2015	Jul. 03, 2016	Dec. 31, 2015	Jun. 28, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Goodwill		$ 257,281	$ 145,607	$ 167,936	$ 170,773
Increase (Decrease) in Deferred Income Taxes		$ 1,200
DCG Systems [Member] [Member]
Business Acquisition [Line Items]
Current assets	$ 64,335
Non-current assets	9,930
Deferred tax assets	207
Current liabilities	(23,859)
Non-current liabilities	(7,889)
Deferred Tax Liabilities	(1,244)
Net tangible assets acquired	41,480
Intangible assets acquired	31,500
Goodwill	109,246
Total	182,226
In-Process Research and Development | DCG Systems [Member] [Member]
Business Acquisition [Line Items]
Intangible assets acquired	13,100
Customer Relationships | DCG Systems [Member] [Member]
Business Acquisition [Line Items]
Intangible assets acquired	6,900
Backlog | DCG Systems [Member] [Member]
Business Acquisition [Line Items]
Intangible assets acquired	1,000
Developed Technology | DCG Systems [Member] [Member]
Business Acquisition [Line Items]
Intangible assets acquired	$ 10,500