Business Acquisitions - Celsis, Additional Information (Details) - Celsis - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
	Jul. 24, 2015	Sep. 26, 2015	Sep. 26, 2015
Business Acquisition [Line Items]
Purchase price	$ 214,500
Assumed liabilities	10,300
Total purchase price allocation	212,236
Cash acquired	$ 2,300
Integration related costs and transaction costs		$ 3,900	$ 7,400
Revenue		4,900	4,900
Operating income (loss)		$ (3,100)	(3,100)
Depreciation, amortization, and Write-down of Inventory			$ 2,400