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Revenue from Contracts with Customers - Additional Information (Detail) - Agreement | 3 Months Ended
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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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