Employee compensation - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Analysis of income and expense [abstract]
Total employee compensation	$ 29,172	$ 27,104	$ 85,731	$ 81,927

The expense of all forms of consideration given by an entity in exchange for a service rendered by employees or for the termination of employment.

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