Stock based compensation - Summary of Stock-based Compensation Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock based compensation expense, net of tax	$ 1,336	$ 141	$ 3,756	$ 2,855
Unit awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock based compensation expense, net of tax	856	247	2,445	1,873
Option awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock based compensation expense, net of tax	$ 480	$ (106)	$ 1,311	$ 982