Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 29, 2019	Sep. 30, 2020	Sep. 29, 2019
Leases [Abstract]
Operating lease cost	$ 23,821	$ 7,841	$ 72,142	$ 23,810
Short-term lease cost, excluding expenses relating to leases with a lease term of one month or less	828	1,124	5,315	2,756
Net lease cost	24,649	8,965	77,457	26,566
Variable lease costs	2,900	4,800	9,700	5,600
Sublease income	$ 900	$ 600	$ 2,900	$ 1,700