v3.26.1
Segment Information - Summary of Significant Segment Expenses and Other Segment Items (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Segment Reporting Information [Line Items]    
Net sales $ 205.5 $ 201.1
Restructuring, impairment and other charges, net (0.7) (2.9)
Share-based compensation expense (6.4) (6.0)
Gain on sale of long-lived assets   0.5
Non-income tax, net   0.1
Depreciation and amortization (15.0) (14.1)
Interest expense, net (2.8) (3.1)
Investment and other loss, net (0.3) (0.5)
Earnings before income taxes 45.4 42.2
Capital Markets - Software Solutions    
Segment Reporting Information [Line Items]    
Net sales 58.6 51.9
Capital Markets - Compliance and Communications Management    
Segment Reporting Information [Line Items]    
Net sales 82.8 83.9
Investment Companies - Software Solutions    
Segment Reporting Information [Line Items]    
Net sales 33.1 32.7
Investment Companies - Compliance and Communications Management    
Segment Reporting Information [Line Items]    
Net sales 31.0 32.6
Operating Segments    
Segment Reporting Information [Line Items]    
Net sales 205.5 201.1
Depreciation and amortization (15.0) (14.1)
Operating Segments | Capital Markets - Software Solutions    
Segment Reporting Information [Line Items]    
Net sales 58.6 51.9
Cost of sales [1] 13.9 14.3
SG&A expenses [1] 25.5 23.6
Other segment items [1]   0.1
Segment Adjusted EBITDA, Total 19.2 13.9
Restructuring, impairment and other charges, net (0.1) (0.6)
Depreciation and amortization (7.6) (7.0)
Operating Segments | Capital Markets - Compliance and Communications Management    
Segment Reporting Information [Line Items]    
Net sales 82.8 83.9
Cost of sales [1] 32.9 30.4
SG&A expenses [1] 16.2 16.9
Other segment items [1]   (0.1)
Segment Adjusted EBITDA, Total 33.7 36.7
Restructuring, impairment and other charges, net (0.2) (1.5)
Depreciation and amortization (1.6) (1.4)
Operating Segments | Investment Companies - Software Solutions    
Segment Reporting Information [Line Items]    
Net sales 33.1 32.7
Cost of sales [1] 13.8 13.3
SG&A expenses [1] 6.2 6.7
Other segment items [1]   (0.1)
Segment Adjusted EBITDA, Total 13.1 12.8
Restructuring, impairment and other charges, net (0.1) (0.4)
Depreciation and amortization (4.8) (4.8)
Operating Segments | Investment Companies - Compliance and Communications Management    
Segment Reporting Information [Line Items]    
Net sales 31.0 32.6
Cost of sales [1] 14.8 16.2
SG&A expenses [1] 4.1 4.2
Other segment items [1]   0.0
Segment Adjusted EBITDA, Total 12.1 12.2
Restructuring, impairment and other charges, net (0.1) (0.1)
Depreciation and amortization (1.0) (0.9)
Operating Segments | Reportable Segment, Aggregation before Other Operating Segment [Member]    
Segment Reporting Information [Line Items]    
Segment Adjusted EBITDA, Total 78.1 75.6
Corporate    
Segment Reporting Information [Line Items]    
Corporate [2] (7.5) (7.4)
Restructuring, impairment and other charges, net (0.2) (0.3)
Depreciation and amortization $ 0.0 $ 0.0
[1] The significant expense categories align with the segment-level information that is regularly provided to the CODM. Segment Cost of sales, segment SG&A expenses and other segment items were adjusted to exclude certain items, as reflected in the Reconciliation of total Segment Adjusted EBITDA sections above, that are not included in the Segment Adjusted EBITDA profitability metric utilized by the CODM.
[2] Corporate is not an operating segment and consists primarily of unallocated SG&A expenses.