Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Dec. 31, 2018
Assets and Liabilities [Abstract]
Right of use assets	$ 96,281	$ 0
Current lease liabilities	14,760	0
Long-term lease liabilities	86,684	0
Total lease liabilities	101,444
Lease cost [Abstract]
Operating lease cost	5,536
Short-term lease cost	833
Variable lease cost	12
Total lease cost	6,381
Cash paid for operating leases	$ 5,050
Weighted-average remaining lease term - operating leases	9 years 3 months 18 days
Weighted-average discount rate - operating leases	6.10%
Undiscounted future lease payments for operating lease liabilities [Abstract]
2019 (excluding the three fiscal months ended March 30, 2019)	$ 15,916
2020	18,527
2021	15,502
2022	13,036
2023	12,215
Thereafter	60,661
ASU 2016-02 [Member]
Assets and Liabilities [Abstract]
Right of use assets		91,462
Current lease liabilities		13,961
Long-term lease liabilities		81,823
Total lease liabilities		95,784
Building and Improvements [Member]
Assets and Liabilities [Abstract]
Right of use assets	91,106
Current lease liabilities	12,076
Long-term lease liabilities	84,202
Building and Improvements [Member] | ASU 2016-02 [Member]
Assets and Liabilities [Abstract]
Right of use assets		86,058
Current lease liabilities		10,644
Long-term lease liabilities		79,000
Machinery and Equipment [Member]
Assets and Liabilities [Abstract]
Right of use assets	5,175
Current lease liabilities	2,684
Long-term lease liabilities	$ 2,482
Machinery and Equipment [Member] | ASU 2016-02 [Member]
Assets and Liabilities [Abstract]
Right of use assets		5,404
Current lease liabilities		3,317
Long-term lease liabilities		$ 2,823