Commitments and Contingencies - Components of Lease Expense (Details) $ in Thousands	12 Months Ended
	Dec. 28, 2019 USD ($)
Lessee Finance Lease, Cost [Abstract]
Amortization of right-of-use Assets	$ 288
Interest on lease liabilities	67
Total finance lease cost	355
Operating lease cost	26,717
Short-term lease cost	5,029
Variable lease cost	4,187
Total lease cost	35,933
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from financing leases	58
Operating cash flows from operating leases	26,409
Financing cash flows from financing leases	191
Right-of-use assets obtained in exchange for new finance lease liabilities	6,539
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 104,963
Weighted-average remaining lease term (years)
Finance leases	6 years 8 months 12 days
Operating leases	5 years 1 month 6 days
Weighted-average discount rate
Finance leases	3.40%
Operating leases	5.80%