Leases - Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2020	Dec. 29, 2019
Leases [Abstract]
Operating cash flows from operating leases	$ 50,891	$ 37,653
Right-of-use assets obtained in exchange for lease obligations, operating leases	$ 20,356	$ 30,573
Weighted average remaining lease term, operating leases	6 years 1 month 6 days	6 years 2 months 12 days
Weighted average discount rate, operating lease	3.10%	4.50%