Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 03, 2021	Apr. 04, 2020	Dec. 31, 2020
Assets and Liabilities [Abstract]
Right of use assets	$ 98,001		$ 102,440
Current lease liabilities	21,275		22,074
Long-term lease liabilities	82,260		86,220
Total lease liabilities	103,535		108,294
Lease expense [Abstract]
Operating lease expense	6,152	$ 5,652
Short-term lease expense	325	194
Variable lease expense	127	23
Total lease expense	6,604	5,869
Cash paid for operating leases	$ 6,161	$ 5,609
Weighted-average remaining lease term - operating leases	8 years 8 months 12 days
Weighted-average discount rate - operating leases	5.90%
Undiscounted future lease payments for operating lease liabilities [Abstract]
2021	$ 16,736
2022	19,360
2023	16,198
2024	14,165
2025	13,026
Thereafter	54,010
Building and Improvements [Member]
Assets and Liabilities [Abstract]
Right of use assets	92,951		97,429
Current lease liabilities	18,622		19,370
Long-term lease liabilities	79,895		83,926
Machinery and Equipment [Member]
Assets and Liabilities [Abstract]
Right of use assets	5,050		5,011
Current lease liabilities	2,653		2,704
Long-term lease liabilities	$ 2,365		$ 2,294