Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 04, 2020	Mar. 30, 2019	Dec. 31, 2019
Assets and Liabilities [Abstract]
Right of use assets	$ 99,506		$ 93,162
Current lease liabilities	21,033		20,217
Long-term lease liabilities	83,440		78,511
Total lease liabilities	104,473		98,728
Lease expense [Abstract]
Operating lease expense	5,652	$ 5,536
Short-term lease expense	194	833
Variable lease expense	23	12
Total lease expense	5,869	6,381
Cash paid for operating leases	$ 5,609	$ 5,050
Weighted-average remaining lease term - operating leases	8 years 9 months 18 days
Weighted-average discount rate - operating leases	5.90%
Undiscounted future lease payments for operating lease liabilities [Abstract]
2020	$ 16,499
2021	19,647
2022	16,044
2023	13,699
2024	12,640
Thereafter	57,162
Building and Improvements [Member]
Assets and Liabilities [Abstract]
Right of use assets	94,353		87,689
Current lease liabilities	18,324		17,410
Long-term lease liabilities	81,036		75,877
Machinery and Equipment [Member]
Assets and Liabilities [Abstract]
Right of use assets	5,153		5,473
Current lease liabilities	2,709		2,807
Long-term lease liabilities	$ 2,404		$ 2,634