Summary of Cash Flow Information Related to Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2019	Mar. 29, 2019	Mar. 30, 2018
Cash paid for amounts included in lease liabilities
Operating cash flows from finance leases		$ 105
Operating cash flows from operating leases		1,944
Financing cash flows from finance leases	$ 140	140	$ 142
Right-of-use assets obtained in exchange for new operating lease liabilities		$ 839