Goodwill and other intangible assets - Narrative (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Cumulative foreign currency translation adjustment	$ (4,300,000)		$ (2,100,000)
Accumulated amortization, cumulative foreign currency translation adjustment	(300,000)		$ 0
Amortization expense	12,200,000	$ 8,400,000
Impairment of goodwill	0	0
Impairment of intangible assets	$ 0	$ 0