Leases - Other Lease Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2021	Sep. 27, 2020	Sep. 26, 2021	Sep. 27, 2020	Dec. 31, 2020
Leases [Abstract]
Cash outflows for amounts included in the measurement of lease liabilities	$ 4,756	$ 5,274	$ 20,479	$ 15,893
ROU assets obtained in exchange for lease obligations, net of modifications	$ 11,189	$ (1,327)	$ 17,390	$ 327
Weighted-average remaining lease term (in years)	3 years 4 months 9 days	3 years 11 months 1 day	3 years 4 months 9 days	3 years 11 months 1 day	3 years 9 months 10 days
Weighted-average discount rate	2.40%	3.10%	2.40%	3.10%	3.10%