Leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2021	Jul. 04, 2020	Jul. 03, 2021	Jul. 04, 2020	Dec. 31, 2020
Assets and Liabilities [Abstract]
Right of use assets	$ 107,426		$ 107,426		$ 102,440
Current lease liabilities	21,542		21,542		22,074
Long-term lease liabilities	91,880		91,880		86,220
Total lease liabilities	113,422		113,422		108,294
Lease expense [Abstract]
Operating lease expense	6,248	$ 5,760	12,400	$ 11,412
Short-term lease expense	428	225	753	419
Variable lease expense	66	6	193	29
Total lease expense	$ 6,742	$ 5,991	13,346	11,860
Cash paid for operating leases			$ 12,176	$ 12,867
Weighted-average remaining lease term - operating leases	9 years 3 months 18 days		9 years 3 months 18 days
Weighted-average discount rate - operating leases	5.70%		5.70%
Undiscounted future lease payments for operating lease liabilities [Abstract]
2021	$ 11,475		$ 11,475
2022	20,560		20,560
2023	17,899		17,899
2024	15,929		15,929
2025	14,653		14,653
Thereafter	67,251		67,251
Building and Improvements [Member]
Assets and Liabilities [Abstract]
Right of use assets	102,214		102,214		97,429
Current lease liabilities	18,805		18,805		19,370
Long-term lease liabilities	89,446		89,446		83,926
Machinery and Equipment [Member]
Assets and Liabilities [Abstract]
Right of use assets	5,212		5,212		5,011
Current lease liabilities	2,737		2,737		2,704
Long-term lease liabilities	$ 2,434		$ 2,434		$ 2,294