Leases (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2021	Sep. 29, 2020	Sep. 28, 2021	Sep. 29, 2020
Leases
Operating	$ 33,034	$ 31,267	$ 97,889	$ 97,222
Variable	18,972	15,304	54,664	42,292
Short-term	71	93	212	346
Total	$ 52,077	$ 46,664	152,765	139,860
Lessee Operating Lease Description
Operating cash flows from operating leases			103,318	85,076
Right-of-use assets obtained in exchange for new operating lease liabilities			$ 50,953	$ 46,068