Accrued expenses and other current liabilities - Narrative (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Payables and Accruals [Abstract]
Sales and other indirect tax liability	$ 0	$ 3,400,000
Historical Tax Withholding Possible Loss
Loss Contingencies [Line Items]
Loss contingency accrual	17,036,000	$ 22,166,000	$ 20,926,000	$ 12,540,000
Minimum | Historical Tax Withholding Possible Loss
Loss Contingencies [Line Items]
Estimate of possible loss	13,400,000
Maximum | Historical Tax Withholding Possible Loss
Loss Contingencies [Line Items]
Estimate of possible loss	$ 17,300,000