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Revenue from Contracts with Customers - Additional Information (Detail) - Agreement	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Disaggregation of Revenue [Line Items]
Percentage of billing expense revenues	2.00%
Sales Revenue Net [Member] | Revenue from Rights Concentration Risk [Member] | Minimum [Member]
Disaggregation of Revenue [Line Items]
Percentage of total accounts receivable		10.00%
Sales Revenue Net [Member] | Revenue from Rights Concentration Risk [Member] | CGI [Member]
Disaggregation of Revenue [Line Items]
Percentage of total accounts receivable	11.90%	17.40%
Number of customers		1
Sales Revenue Net [Member] | Revenue from Rights Concentration Risk [Member] | Fidelity [Member]
Disaggregation of Revenue [Line Items]
Percentage of total accounts receivable	12.90%
Sales Revenue Net [Member] | Revenue from Rights Concentration Risk [Member] | Populus [Member]
Disaggregation of Revenue [Line Items]
Percentage of total accounts receivable	11.70%
Sales Revenue Net [Member] | Revenue from Rights Concentration Risk [Member] | Fidelity, CGI and Populus [Member]
Disaggregation of Revenue [Line Items]
Number of customers	3
Top Ten Customers [Member]
Disaggregation of Revenue [Line Items]
Revenue percentage of total revenue	56.00%	51.00%
Data and Analytics Services [Member]
Disaggregation of Revenue [Line Items]
Percent of revenue from services	100.00%

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- Definition

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- Definition

Revenue percentage to aggregate revenue.

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