Basis of presentation and description of business - IPO (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended	12 Months Ended
	Jul. 24, 2020	Sep. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Acquisitions
Proceeds from initial public offering, net of underwriting discounts and commissions			$ 0	$ 326,316	$ 0
Offering costs			$ 543	$ 7,256	721
Common stock, shares authorized (in shares)	500,000,000		500,000,000	500,000,000
Common stock, par value (in dollars per share)	$ 0.001		$ 0.001	$ 0.001
Preferred stock, shares authorized ( in shares)	50,000,000		50,000,000	50,000,000
Preferred stock, par value (in dollars per share)	$ 0.001		$ 0.001	$ 0.001
Repayment of debt	$ 205,000
Accrued interest paid	3,400
Prepayment penalty	2,000
Write-off of debt issuance cost	$ 3,200
Loss on debt extinguishment		$ (5,200)	$ (449)	$ (5,213)	$ 0
IPO
Acquisitions
Issuance of common stock (in shares)	13,500,000
Offering price (in dollars per share)	$ 26.00
Proceeds from initial public offering, net of underwriting discounts and commissions	$ 319,000
Underwriting discount and commissions	24,700
Offering costs	$ 7,300
Issuance of common stock				322,413
Private placement
Acquisitions
Issuance of common stock (in shares)	85,880
Offering costs			$ 600	700
Issuance of common stock	$ 2,200			$ 2,233