Leases - Maturities of lease liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Operating Leases Maturities:
2021	$ 9,818
2022	10,266
2023	10,393
2024	8,317
2025	8,036
Thereafter	40,872
Total Lease Payments	87,702
Less: Imputed Interest	29,697
Total Lease Obligations	58,005	$ 64,416
Finance Leases Maturities:
2021	4,446
2022	4,570
2023	4,707
2024	4,847
2025	4,992
Thereafter	28,902
Total Lease Payments	52,464
Less: Imputed Interest	10,746
Total Lease Obligations	$ 41,718	$ 45,141