Leases - Future Minimum Cash Outflow and Weighted-average Remaining Lease Term and Discount Rate (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Future minimum lease payments finance lease
2021	$ 5,848
2022	5,980
2023	6,114
2024	6,252
2025	5,930
Thereafter	73,723
Total lease payments	103,847
Less interest portion	(55,698)
Finance lease obligations	48,149
Future minimum lease payments operating lease
2021	2,808
2022	1,441
2023	430
2024	118
2025	77
Thereafter	151
Total lease payments	5,025
Less interest portion	(503)
Operating lease obligations	4,522
Future minimum lease payments finance and operating lease
2021	8,656
2022	7,421
2023	6,544
2024	6,370
2025	6,007
Thereafter	73,874
Total lease payments	108,872
Less interest portion	(56,201)
Total lease liabilities	$ 52,671	$ 54,245
Lease term and discount rate
Operating leases -Weighted-average remaining lease term (in years)	1 year 7 months 6 days
Finance leases - Weighted-average remaining lease term (in years)	16 years 1 month 6 days
Operating leases - Weighted-average discount rate	4.50%
Finance leases - Weighted-average discount rate	10.50%
Finance lease term	22 years
Minimum
Lease term and discount rate
Operating lease term	1 year
Maximum
Lease term and discount rate
Operating lease term	10 years

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