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Revenue from Contracts with Customers - Additional Information (Detail) - Agreement	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Sales Revenue Net [Member] | Fidelity, CGI and Populus [Member]
Disaggregation of Revenue [Line Items]
Number of customers	3	2	3
Sales Revenue Net [Member] | Revenue from Rights Concentration Risk [Member] | Minimum [Member]
Disaggregation of Revenue [Line Items]
Percentage of total accounts receivable	10.00%		10.00%	10.00%
Sales Revenue Net [Member] | Revenue from Rights Concentration Risk [Member] | CGI [Member]
Disaggregation of Revenue [Line Items]
Percentage of total accounts receivable	10.40%	14.00%	11.10%	15.40%
Sales Revenue Net [Member] | Revenue from Rights Concentration Risk [Member] | Allegis [Member]
Disaggregation of Revenue [Line Items]
Percentage of total accounts receivable		11.70%		10.60%
Sales Revenue Net [Member] | Revenue from Rights Concentration Risk [Member] | Fidelity [Member]
Disaggregation of Revenue [Line Items]
Percentage of total accounts receivable	18.10%		15.40%
Sales Revenue Net [Member] | Revenue from Rights Concentration Risk [Member] | Populus [Member]
Disaggregation of Revenue [Line Items]
Percentage of total accounts receivable	12.70%		12.30%
Top Ten Customers [Member]
Disaggregation of Revenue [Line Items]
Revenue percentage of total revenue	59.00%	56.00%	58.00%	54.00%
Data and Analytics Services [Member]
Disaggregation of Revenue [Line Items]
Percent of revenue from services			100.00%

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