Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Leases [Abstract]
Operating cash flows from operating leases	$ 13,158	$ 9,003	$ 38,774	$ 27,817
Right-of-use assets obtained in exchange for lease obligations, operating leases	$ 2,097	$ 1,363	$ 102,521	$ 25,622
Weighted average remaining lease term, operating leases	6 years 2 months 12 days	6 years 4 months 24 days	6 years 2 months 12 days	6 years 4 months 24 days
Weighted average discount rate, operating lease	3.10%	4.50%	3.10%	4.50%