Fair Value Measurements - Summary of Assumptions Used to Calculate the Estimated Earnout Liabilities (Parenthetical) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Summary Of Assumptions Used To Calculate Estimated Earnout Liabilities [Line Items]
Earnout paid	$ 10,770,000	$ 0
CrowdReason LLC and CorrelationAdvisors
Summary Of Assumptions Used To Calculate Estimated Earnout Liabilities [Line Items]
Earnout target, capital available to be settled in cash	$ 30,000,000.0
Earnout target, specific revenue growth thresholds period	2024-10
Discount Rate	5.00%
Earnout Period	2024
Method	Probability-weighted discounted cash flows and Monte Carlo simulation
Track1099 LLC
Summary Of Assumptions Used To Calculate Estimated Earnout Liabilities [Line Items]
Earnout target, capital available to be settled in cash	$ 12,500,000
Earnout target, specific revenue growth thresholds period	2023-04
Discount Rate	10.00%
Earnout Period	2023
Method	Probability-weighted discounted cash flows and Monte Carlo simulation
Davo Technologies LLC
Summary Of Assumptions Used To Calculate Estimated Earnout Liabilities [Line Items]
Earnout target, capital available to be settled in cash	$ 0
Earnout target, specific revenue growth thresholds period	2023-03
Discount Rate	8.00%
Earnout Period	2023
Method	Probability-weighted discounted cash flows and Monte Carlo simulation
Transaction Tax Resources, Inc.
Summary Of Assumptions Used To Calculate Estimated Earnout Liabilities [Line Items]
Earnout target, capital available to be settled in cash	$ 26,400,000
Earnout target, specific revenue growth thresholds period	2022-12
Earnout paid	$ 13,200,000
Discount Rate	15.00%
Earnout Period	2022
Method	Probability-weighted discounted cash flows and Monte Carlo simulation
Transaction Tax Resources, Inc. | Second Earnout Period
Summary Of Assumptions Used To Calculate Estimated Earnout Liabilities [Line Items]
Earnout Period	2023
Method	build-up method with a risk-free rate commensurate with the term of the earnout based on the equity, asset and revenue betas, size premium, and the Company’s specific risk premium, as well as the market risk premium using a bottom-up approach.
Business Licenses
Summary Of Assumptions Used To Calculate Estimated Earnout Liabilities [Line Items]
Earnout target, capital available to be settled in cash	$ 20,700,000
Earnout target, specific revenue growth thresholds period	2024-11
Discount Rate	6.20%
Earnout Period	2024
Method	Scenario-based approach