Leases - Maturities of lease liabilities (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Operating Leases
2021	$ 30,318
2022	28,418
2023	25,313
2024	25,381
2025	25,433
Thereafter	203,089
Total lease payments	337,952
Less: amount representing interest	(87,788)
Total lease liabilities	250,164
Finance Leases
2021	3,722
2022	3,404
2023	3,162
2024	3,056
2025	2,897
Thereafter	11,275
Total minimum lease payments	27,516
Less: amount representing interest	(4,989)
Total lease liabilities	$ 22,527