Leases - Maturities of lease liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Operating leases
2022	$ 6,795
2023	5,664
2024	4,628
2025	3,219
2026	2,305
Thereafter	5,794
Total lease payments	28,405
Less imputed interest	(4,266)
Total	24,139	$ 27,542
Finance leases
2022	146
2023	68
2024	40
2025	5
2026	1
Thereafter	0
Total lease payments	260
Less imputed interest	(13)
Total	$ 247	$ 424