Segment Information - Schedule of Depreciation and Amortization, Assets and Capital Expenditures (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Depreciation and amortization	$ 60.2	$ 56.7	$ 46.3
Assets	841.6	806.9
Capital expenditures	65.9	61.8	54.2
Operating Segments
Segment Reporting Information [Line Items]
Depreciation and amortization	60.1	56.6	46.2
Capital expenditures	64.0	59.5	50.6
Operating Segments | Capital Markets - Software Solutions
Segment Reporting Information [Line Items]
Depreciation and amortization	27.6	29.8	23.0
Capital expenditures	32.5	31.5	27.0
Operating Segments | Capital Markets - Compliance and Communications Management
Segment Reporting Information [Line Items]
Depreciation and amortization	9.8	8.0	6.7
Capital expenditures	7.7	7.4	5.0
Operating Segments | Investment Companies - Software Solutions
Segment Reporting Information [Line Items]
Depreciation and amortization	18.2	14.2	11.9
Capital expenditures	21.1	18.8	15.6
Operating Segments | Investment Companies - Compliance and Communications Management
Segment Reporting Information [Line Items]
Depreciation and amortization	4.5	4.6	4.6
Capital expenditures	2.7	1.8	3.0
Corporate
Segment Reporting Information [Line Items]
Depreciation and amortization	0.1	0.1	0.1
Capital expenditures	$ 1.9	$ 2.3	$ 3.6