Lease Commitments and Contingencies (Details) $ in Thousands	9 Months Ended
	Sep. 29, 2019 USD ($)
Leases [Abstract]
Operating lease expense	$ 4,718
Variable lease expense	1,383
Short-term lease expense	3,739
Sublease income	(244)
Total lease cost	$ 9,596
Weighted-average remaining lease term	19 years 3 months 18 days
Weighted-average discount rate	4.40%
Operating cash flows for operating leases	$ 4,784
Leased assets obtained in exchange for new operating lease liabilities (non-cash activity)	$ 1,516