Leases Maturity of Operating Lease LIability (Details) - USD ($) $ in Thousands	Mar. 28, 2020	Dec. 28, 2019	Dec. 30, 2018
Leases [Abstract]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	$ 6,869
Lessee, Operating Lease, Liability, Payments, Due Year Two	8,219
Lessee, Operating Lease, Liability, Payments, Due Year Three	7,550
Lessee, Operating Lease, Liability, Payments, Due Year Four	7,102
Lessee, Operating Lease, Liability, Payments, Due Year Five	6,266
Lessee, Operating Lease, Liability, Payments, Due after Year Five	34,835
Lessee, Operating Lease, Liability, Payments, Due	70,841
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	10,847
Operating Lease, Liability	59,994		$ 67,300
Current portion of operating lease liabilities	6,950	$ 6,843
Operating Lease, Liability, Noncurrent	$ 53,044	$ 54,928