Leases, Balance Sheet Classification (Details) - USD ($) $ in Thousands	Mar. 30, 2019	Dec. 29, 2018
Operating leases
Operating lease right-of-use assets	$ 75,503
Current portion of operating lease liabilities	17,432
Operating lease liabilities	58,910
Total operating lease liabilities	76,342
Finance leases
Property, plant and equipment, net	163,532	$ 171,032
Current portion of long-term finance leases	1,262
Long-term finance leases	1,933
Total finance lease liabilities	3,195	$ 3,706
Finance Leases [Member]
Finance leases
Property, plant and equipment, gross	9,923
Accumulated depreciation	(4,840)
Property, plant and equipment, net	$ 5,083

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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