Stock-based Compensation - Narrative (Details)			1 Months Ended		3 Months Ended		12 Months Ended
	Jan. 01, 2024 shares	Jan. 01, 2022	Nov. 30, 2021 $ / shares shares	May 31, 2021 USD ($) purchase_period shares	Mar. 31, 2024 USD ($) shares	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($) shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options issued (in shares)					3,868,742		4,340,052
Shares granted (in shares)					0		0
Total unrecognized stock-based compensation expense (less than) | $					$ 0
Stock-based compensation expense | $					40,132,000	$ 44,938,000
Accrued salary, payroll tax, and employee benefit liabilities | $					39,036,000		$ 36,171,000
Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized stock-based compensation expense | $					$ 1,700,000
Total unrecognized compensation cost, weighted-average period					2 months 12 days
Stock-based compensation expense | $					$ 2,400,000	2,100,000
Offering period (in months)				12 months
Number of purchase periods | purchase_period				2
Duration of purchase periods (in months)				6 months
Percentage of eligible compensation				15.00%
Maximum amount each participant can contribute to a defined contribution plan per calendar year | $				$ 25,000
Maximum number of shares each participant can purchase during purchase period (in shares)				2,500
Purchase price, threshold, percentage of fair market value				85.00%
Accrued salary, payroll tax, and employee benefit liabilities | $					11,200,000		$ 5,000,000
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized stock-based compensation expense | $					$ 516,700,000
Total unrecognized compensation cost, weighted-average period					2 years 9 months 18 days
Shares granted (in shares)					2,375,713
Restricted Stock Units | IPO | Quarterly or Annual Vesting Schedule
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
RSUs vesting period (in years)					4 years
Performance Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
RSUs vesting period (in years)					3 years
Total unrecognized stock-based compensation expense | $					$ 5,200,000
Total unrecognized compensation cost, weighted-average period					2 years 2 months 12 days
Shares granted (in shares)					46,986
Award payout range, percentage					1
Performance Shares | Revenue Performance Goals
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares granted (in shares)					35,239
Percentage of awards					75.00%
Performance Shares | Revenue Performance Goals | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award payout range, percentage					0
Performance Shares | Revenue Performance Goals | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award payout range, percentage					2
Performance Shares | Non-GAAP Operating Margin Performance
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares granted (in shares)					11,747
Percentage of awards					25.00%
Performance Shares | Non-GAAP Operating Margin Performance | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award payout range, percentage					0
Performance Shares | Non-GAAP Operating Margin Performance | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award payout range, percentage					1.50
Restricted Stock Awards | Levelset
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
RSUs vesting period (in years)			2 years
Issuance of unregistered common stock for certain employees (in shares)			199,670
Business acquisition, vesting period			2 years
Share price (in dollars per share) | $ / shares			$ 95.05
Stock-based compensation expense | $					$ 0	6,600,000
Stock-based compensation expense related to early vested RSAs | $						5,300,000
Holdback amount expensed | $						$ 3,400,000
Common Stock | Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares outstanding as a percent				1.00%
Maximum number of additional shares of common stock that may be issued (in shares)				3,900,000
Maximum amount common stock that may be issued (in shares)	1,448,064			5,332,064
Period of common stock reserved for issuance (in years)				10 years
2021 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options issued (in shares)					0
2021 Equity Incentive Plan | Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for issuance (in shares)					36,089,036		44,622,937
Shares outstanding as a percent		5.00%
Maximum number of additional shares of common stock that may be issued (in shares)	7,240,323
Maximum amount common stock that may be issued (in shares)					51,863,260