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Stockholders' equity - Narrative (Details) $ / shares in Units, $ in Thousands		1 Months Ended	3 Months Ended				9 Months Ended
	Jan. 01, 2024 shares	Feb. 29, 2024 shares	Sep. 30, 2024 USD ($) $ / shares shares	Mar. 31, 2024 shares	Sep. 30, 2023 USD ($)	Mar. 31, 2023 shares	Sep. 30, 2024 USD ($) vote $ / shares shares	Sep. 30, 2023 USD ($)	May 02, 2024 USD ($)	Feb. 14, 2024 USD ($)	Dec. 31, 2023 $ / shares shares	Oct. 29, 2021 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, shares authorized (in shares)			50,000,000				50,000,000				50,000,000
Preferred stock, par value (in dollars per share) | $ / shares			$ 0.00001				$ 0.00001				$ 0.00001
Preferred stock, shares outstanding (in shares)			0				0				0
Preferred stock, shares issued (in shares)			0				0				0
Number of votes per common stock | vote							1
Share repurchase program, shares authorized | $									$ 150,000	$ 100,000
Extension repurchase program | $									$ 50,000
Repurchases of common stock (in shares)			6,319,939				15,072,277
Repurchases of common stock | $			$ 51,423				$ 142,535
Total shares of common stock reserved (in shares)			32,636,254				32,636,254				27,803,828
Common stock, shares issued (in shares)			146,691,638				146,691,638				157,166,360
Stock-based compensation capitalized as a software | $			$ 2,300		$ 2,100		$ 6,800	$ 6,800
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)							7,809,727
Unrecognized compensation costs, excluding options | $			$ 150,800				$ 150,800
Unrecognized compensation costs, period for recognition (in years)							2 years 8 months 12 days
Performance-Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares right to receive (in shares)							1
Granted (in shares)		450,170		553,568		645,833	553,568
Award vesting rights, percentage		75.00%		75.00%
Corporate performance metric attainment percentage			0.45				0.45
Authorized attainment percentage of shares issued		70.00%
Unrecognized compensation costs, excluding options | $			$ 2,500				$ 2,500
Unrecognized compensation costs, period for recognition (in years)							1 year 7 months 6 days
Performance-Based Awards | Share-based Payment Arrangement, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, percentage							25.00%
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)							4 years
Contractual term (in years)							10 years
Stock options outstanding (in shares)			2,208,391				2,208,391				4,621,021
Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercised (in shares)							1,558
Exercised (in dollars per share) | $ / shares							$ 6.58
SARs outstanding (in shares)			3,000				3,000
Contingently issuable shares under ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs, excluding options | $			$ 3,300				$ 3,300
Unrecognized compensation costs, period for recognition (in years)							1 year
Total shares of common stock reserved (in shares)	1,571,663											2,800,000
Minimum annual increase in shares reserved for issuance							1.00%
Percent of outstanding shares							300.00%
Common stock, shares issued (in shares)			554,039				554,039
Minimum | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)							3 years
Minimum | Performance-Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, percentage				0.00%
Maximum | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)							4 years
Maximum | Performance-Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, percentage				150.00%
2021 Stock incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares reserved for future issuance (in shares)			13,800,000				13,800,000
Annual percentage increase, term							0.05
Number of shares reserved for future issuance increased (in shares)	7,858,318
Stock options outstanding (in shares)			2,158,391				2,158,391				4,571,021
Exercisable, awards outstanding (in shares)			2,153,129				2,153,129
Amended and Restated 2010 Equity Incentive Plan | Performance-Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options outstanding (in shares)			50,000				50,000
Exercisable, awards outstanding (in shares)			35,416				35,416

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