Leases, Cash Flow Information (Details) $ in Thousands	3 Months Ended
	Mar. 30, 2019 USD ($)
Cash paid for amounts included in measurement of lease liabilities
Operating cash flows from operating leases	$ 5,378
Operating cash flows from finance leases	36
Financing cash flows from finance leases	392
Right-of-use assets obtained in exchange for lease liabilities
Operating leases	0
Finance Leases	$ 0