Goodwill and other intangible assets - Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Goodwill [Roll Forward]
Goodwill, beginning of period	$ 841,984	$ 541,850	$ 845,734	$ 541,480
Goodwill acquired	0	0	3,014	370
Foreign currency translation adjustment	(18,313)	0	(25,077)	0
Goodwill, end of period	$ 823,671	$ 541,850	$ 823,671	$ 541,850