Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
Leases
Operating cash flows from finance leases	$ 151
Financing cash flows from finance leases	466
Operating cash flows from operating leases	9,480	$ 10,116
Right-of-use assets obtained in exchange for new finance lease liabilities	19
Right-of-use assets obtained in exchange for new operating lease liabilities	7,451	1,040
Cash received from sublease income	$ 2,494	$ 2,061