Leases - Components of Company's Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
Leases [Abstract]
Operating lease cost	$ 14,360	$ 15,771	$ 28,711	$ 31,316
Amortization of lease asset	2,391	2,053	4,938	4,122
Interest on lease liabilities	238	245	463	521
Variable lease cost	8,576	7,791	21,861	16,969
Total lease cost	$ 25,565	$ 25,860	$ 55,973	$ 52,928