Leases - Lease Balances (Details) - USD ($) $ in Thousands	Sep. 26, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Right-of-use assets	$ 46,655	$ 50,160
Long-term lease liability	40,407	43,827
Total lease liabilities	$ 50,327	$ 53,852
Weighted Average Remaining Lease Term (years)	8 years 1 month 6 days	8 years 4 months 24 days
Weighted Average Discount Rate	5.00%	4.90%
Right-of-use assets
Lessee, Lease, Description [Line Items]
Right-of-use assets	$ 46,655	$ 50,160
Accrued Liabilities
Lessee, Lease, Description [Line Items]
Short-term lease liability	9,920	10,025
Long-term lease
Lessee, Lease, Description [Line Items]
Long-term lease liability	$ 40,407	$ 43,827