Leases, Cash Flow Information (Details) $ in Thousands	12 Months Ended
	Dec. 28, 2019 USD ($)
Cash Flow Information
Operating cash flows from operating leases	$ 19,534
Operating cash flows from finance leases	286
Financing cash flows from finance leases	1,917
Right-of-use assets obtained in exchange for lease liabilities
Operating leases	2,760
Finance Leases	$ 14,549