Leases - Total lease cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2021	Dec. 31, 2020
Finance lease costs:
Amortization of finance lease assets	$ 2,732	$ 2,851
Interest on lease liabilities	951	1,048
Total finance lease costs	3,683	3,899
Operating lease costs:
Operating lease costs	25,489	25,821
Variable lease cost	(30)	724
Short-term lease cost	135	321
Total operating lease costs	$ 25,594	$ 26,866