Revenue from Contracts with Customers - Additional Information (Detail) - Agreement	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disaggregation of Revenue [Line Items]
Percentage of billing expense revenues			2.00%
Sales Revenue Net [Member] \| Fidelity, CGI and Populus [Member]
Disaggregation of Revenue [Line Items]
Number of customers	1	3	1	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%	10.00%
Sales Revenue Net [Member] \| Revenue from Rights Concentration Risk [Member] \| CGI [Member]
Disaggregation of Revenue [Line Items]
Percentage of total accounts receivable		11.00%		11.50%
Sales Revenue Net [Member] \| Revenue from Rights Concentration Risk [Member] \| Allegis [Member]
Disaggregation of Revenue [Line Items]
Percentage of total accounts receivable		12.40%		12.10%
Sales Revenue Net [Member] \| Revenue from Rights Concentration Risk [Member] \| Fidelity [Member]
Disaggregation of Revenue [Line Items]
Percentage of total accounts receivable	26.70%	15.00%	25.60%	14.00%
Top Ten Customers [Member]
Disaggregation of Revenue [Line Items]
Revenue percentage of total revenue	61.00%	58.00%	60.00%	58.00%
Data and Analytics Services [Member]
Disaggregation of Revenue [Line Items]
Percent of revenue from services			100.00%