Other - Interest Expense and Other, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Other Income and Expenses [Abstract]
Interest income and other expense, net	$ 3,720	$ 5,078	$ 20,724	$ 17,093
Interest expense	(188)	(7,118)	(569)	(21,314)
Amortization of debt costs and discount on debt	0	1,278	0	590
Capitalized interest	5	7	22	59
Total interest expense and other, net	3,537	(755)	20,177	(3,572)
Interest income and other expense, net	$ 10,100		$ 10,100
Fair value adjustment		$ 1,900		$ 1,900