Leases - Other Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
Leases [Abstract]
Gain (loss) on sale-leaseback transactions	$ (800)	$ 100	$ 567	$ 105
Lease assets and liabilities resulting from lease modifications and new leases			39,953	36,124
Operating cash flows from operating leases			49,143	36,006
Operating cash flows from finance leases			36	135
Financing cash flows from finance leases			$ 1,134	$ 981