Estimated Fair Values of Assets Acquired and Liabilities Assumed for Celfrost Acquisition (Details) - USD ($) $ in Thousands	Jul. 04, 2015	Jan. 03, 2015	Oct. 15, 2013
Business Acquisition [Line Items]
Goodwill	$ 833,382	$ 808,491
Celfrost [Member]
Business Acquisition [Line Items]
Current assets			$ 5,514
Property, plant and equipment			182
Goodwill			7,661
Other intangibles			4,333
Other asset			4
Current liabilities			(5,573)
Other non-current liabilities			(875)
Consideration paid at closing			11,246
Business Acquisition, Deferred Payments			1,067
Net assets acquired and liabilities assumed			12,313
Celfrost [Member] | as initially reported
Business Acquisition [Line Items]
Current assets			5,638
Property, plant and equipment			182
Goodwill			5,943
Other intangibles			4,333
Other asset			4
Current liabilities			(3,979)
Other non-current liabilities			(875)
Consideration paid at closing			11,246
Business Acquisition, Deferred Payments			1,067
Net assets acquired and liabilities assumed			12,313
Celfrost [Member] | Scenario, Adjustment [Member]
Business Acquisition [Line Items]
Current assets			(124)
Property, plant and equipment			0
Goodwill			1,718
Other intangibles			0
Other asset			0
Current liabilities			(1,594)
Other non-current liabilities			0
Consideration paid at closing			0
Business Acquisition, Deferred Payments			0
Net assets acquired and liabilities assumed			$ 0