Leases - Maturities of lease liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Operating leases
2020	$ 6,914
2021	5,472
2022	4,721
2023	4,341
2024	3,270
Thereafter	8,604
Total lease payments	33,322
Less imputed interest	(5,780)
Lease liability	27,542	$ 19,621
Financing leases
2020	292
2021	89
2022	45
2023	17
2024	2
Thereafter	0
Total lease payments	445
Less imputed interest	(21)
Total	$ 424	$ 751