Other - Interest Expense and Other, Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
Other Income and Expenses [Abstract]
Interest expense	$ (189)	$ (7,137)	$ (381)	$ (14,196)
Amortization of debt costs and (premium)/discount on debt	0	205	0	(688)
Capitalized interest	10	8	17	52
Interest income and other expense, net	2,965	5,410	17,004	12,015
Total interest expense and other, net	2,786	(1,514)	16,640	(2,817)
Interest income and other expense, net	$ 10,100		$ 10,100
Fair value adjustment		$ 1,900		$ 1,900