Income taxes (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Income taxes
Effective tax rate (in percentage)	32.13%	17.02%	29.51%	17.85%
Income tax expense (benefit)	$ (992)	$ (225)	$ (4,300)	$ (234)

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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+ Details