Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Jan. 01, 2017	Jan. 03, 2016
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill, Acquired During Period		$ 89,600
Amortization of Intangible Assets	$ 19,700	13,000	$ 5,100
Other intangible assets, accumulated amortization	(38,440)	18,568
Intangible Assets, Net (Excluding Goodwill)	25,519	44,218
Other intangible assets, net	25,519
Intangible Assets, Gross (Excluding Goodwill)	63,959	62,786
Patents and Purchased Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Other intangible assets, gross	52,313	48,640
Other intangible assets, accumulated amortization	(26,794)	(15,529)
Other intangible assets, net	25,519	33,111
Project Pipeline Asset [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Other intangible assets, gross	9,446	9,446
Other intangible assets, accumulated amortization	(9,446)	(1,804)
Other intangible assets, net	0	7,642
In Process Research and Development [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Other intangible assets, gross	1,200	3,700
Other intangible assets, accumulated amortization	(1,200)	(485)
Other intangible assets, net	0	3,215
Other Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Other intangible assets, gross	1,000	1,000
Other intangible assets, accumulated amortization	(1,000)	(750)
Other intangible assets, net	$ 0	$ 250