Leases - Supplemental Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Financing cash flows from finance leases	$ 0	$ 1,302	$ 1,384	$ 2,239
Operating cash flows from finance leases	0	0	0	0
Operating cash flows from operating leases	6,168	6,737	19,097	20,775
ROU assets obtained in exchange for lease obligations:
Finance lease liabilities	2,338	0	3,722	0
Operating lease liabilities	$ 0	$ 0	$ 4,497	$ 288
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent		us-gaap:OtherAssetsNoncurrent