Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Total capacity under master lease agreement	$ 20,000
Finance Lease, Right-of-use Asset, Gross	8,200
Accumulated Amortization of Finance Leases	1,800
Capital Leased Assets, Gross		$ 11,400
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation		1,500
Operating Lease, Right-of-Use Asset	87,825	0
Finance Lease, Right-of-Use Asset	6,413
Right-of-use assets, Total	94,238
Operating Lease, Liability, Current	24,345	0
Finance Lease, Liability, Current	2,103	1,989
Operating Lease, Liability, Noncurrent	64,643	0
Finance Lease, Liability, Noncurrent	6,624	6,579
Lease liabilities, Total	97,715	8,568
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	21,123
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months		27,500
Lessee, Operating Lease, Liability, Payments, Due Year Two	24,633	23,600
Lessee, Operating Lease, Liability, Payments, Due Year Three	19,715	18,800
Lessee, Operating Lease, Liability, Payments, Due Year Four	13,457	12,800
Lessee, Operating Lease, Liability, Payments, Due Year Five	8,860	8,700
Lessee, Operating Lease, Liability, Payments, Due after Year Five	10,493	10,400
Lessee, Operating Lease, Liability, Payments, Due	98,281	101,800
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(9,293)
Operating Lease, Liability	88,988
Finance Lease, Liability, Payments, Due Remainder of Fiscal Year	1,750
Finance Lease, Liability, Payments, Due Next Twelve Months		2,000
Finance Lease, Liability, Payments, Due Year Two	2,250	2,000
Finance Lease, Liability, Payments, Due Year Three	2,070	1,800
Finance Lease, Liability, Payments, Due Year Four	1,685	1,500
Finance Lease, Liability, Payments, Due Year Five	1,165	1,000
Finance Lease, Liability, Payments, Due after Year Five	222	200
Finance Lease, Liability, Payments, Due	9,142	$ 8,600
Finance Lease, Liability, Undiscounted Excess Amount	(415)
Finance Lease, Liability	8,727
Finance Lease, Right-of-Use Asset, Amortization	230
Finance Lease, Interest Expense	49
Operating Lease, Cost	7,219
Short-term Lease, Cost	25
Variable Lease, Cost	19
Lease, Cost	7,542
Operating Lease, Payments	(5,027)
Finance Lease, Interest Payment on Liability	(49)
Finance Lease, Principal Payments	(372)
Lease Payments, Total	5,448
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 2,800
Operating Lease, Weighted Average Remaining Lease Term	4 years 5 months 25 days
Finance Lease, Weighted Average Remaining Lease Term	3 years 8 months 6 days
Operating Lease, Weighted Average Discount Rate, Percent	4.33%
Finance Lease, Weighted Average Discount Rate, Percent	3.96%
Machinery and Equipment [Member]
Lessee, Lease, Description [Line Items]
Lessee, Finance Lease, Term of Contract	5 years
Maximum | Real Estate [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract	10 years
Maximum | Machinery and Equipment [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract	5 years
Minimum | Real Estate [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract	3 years
Minimum | Machinery and Equipment [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract	3 years
Finance Lease [Member] | Asset under Construction [Member]
Lessee, Lease, Description [Line Items]
Property, Plant and Equipment, Gross	$ 3,300