Property and equipment - Other fixed assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Total other fixed assets, net	$ 42,647	$ 34,590
Computer hardware and software
Property, Plant and Equipment [Line Items]
Other fixed assets, net	21,758	15,039
Vehicles
Property, Plant and Equipment [Line Items]
Other fixed assets, net	7,934	9,072
Leasehold improvements
Property, Plant and Equipment [Line Items]
Other fixed assets, net	7,136	7,136
Buildings
Property, Plant and Equipment [Line Items]
Other fixed assets, net	7,039	7,039
Other
Property, Plant and Equipment [Line Items]
Other fixed assets, net	6,087	5,095
Depreciable total, net
Property, Plant and Equipment [Line Items]
Other fixed assets, net	49,954	43,381
Less accumulated depreciation and impairment	(30,382)	(27,692)
Total other fixed assets, net	19,572	15,689
Land
Property, Plant and Equipment [Line Items]
Total other fixed assets, net	$ 23,075	$ 18,901
Minimum | Other fixed assets
Property, Plant and Equipment [Line Items]
Useful life	3 years
Maximum | Other fixed assets
Property, Plant and Equipment [Line Items]
Useful life	10 years