Leases Supplemental Cash Flow Information Related To Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
Leases [Abstract]
Operating cash flows from operating leases	$ (3,791)	$ (5,088)
Operating cash flows from finance leases	(5)	(9)
Financing cash flows from finance leases	$ (46)	$ (70)