v3.26.1
Segment Information - Summary of Significant Segment Expenses and Other Segment Items (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting Information [Line Items]        
Net sales $ 224.2 $ 218.1 $ 429.7 $ 419.2
Restructuring, impairment and other charges, net (2.3) (1.0) (3.0) (3.9)
Share-based compensation expense (9.3) (7.5) (15.7) (13.5)
Gain on sale of long-lived assets       0.5
Non-income tax, net 0.3 0.1 0.3 0.2
Depreciation and amortization (15.0) (15.1) (30.0) (29.2)
Interest expense, net (3.5) (3.8) (6.3) (6.9)
Investment and other loss, net (0.4) (0.3) (0.7) (0.8)
Earnings before income taxes 52.1 48.7 97.5 90.9
Capital Markets - Software Solutions        
Segment Reporting Information [Line Items]        
Net sales 65.7 59.1 124.3 111.0
Capital Markets - Compliance and Communications Management        
Segment Reporting Information [Line Items]        
Net sales 95.9 93.5 178.7 177.4
Investment Companies - Software Solutions        
Segment Reporting Information [Line Items]        
Net sales 33.7 33.1 66.8 65.8
Investment Companies - Compliance and Communications Management        
Segment Reporting Information [Line Items]        
Net sales 28.9 32.4 59.9 65.0
Operating Segments        
Segment Reporting Information [Line Items]        
Net sales 224.2 218.1 429.7 419.2
Depreciation and amortization (15.0) (15.1) (30.0) (29.2)
Operating Segments | Capital Markets - Software Solutions        
Segment Reporting Information [Line Items]        
Net sales 65.7 59.1 124.3 111.0
Cost of sales [1] 14.7 13.6 28.6 27.9
SG&A expenses [1] 27.3 23.2 52.8 46.8
Other segment items [1] 0.0 (0.1) 0.0  
Segment Adjusted EBITDA, Total 23.7 22.4 42.9 36.3
Restructuring, impairment and other charges, net (0.6)   (0.7) (0.6)
Depreciation and amortization (7.6) (7.7) (15.2) (14.7)
Operating Segments | Capital Markets - Compliance and Communications Management        
Segment Reporting Information [Line Items]        
Net sales 95.9 93.5 178.7 177.4
Cost of sales [1] 34.4 37.0 67.3 67.4
SG&A expenses [1] 21.4 19.6 37.6 36.5
Other segment items [1] (0.1) 0.1 (0.1)  
Segment Adjusted EBITDA, Total 40.2 36.8 73.9 73.5
Restructuring, impairment and other charges, net (0.4) (0.3) (0.6) (1.8)
Depreciation and amortization (1.7) (1.7) (3.3) (3.1)
Operating Segments | Investment Companies - Software Solutions        
Segment Reporting Information [Line Items]        
Net sales 33.7 33.1 66.8 65.8
Cost of sales [1] 13.3 12.8 27.1 26.1
SG&A expenses [1] 5.7 6.0 11.9 12.7
Other segment items [1] 0.1 0.1 0.1  
Segment Adjusted EBITDA, Total 14.6 14.2 27.7 27.0
Restructuring, impairment and other charges, net (0.3) (0.2) (0.4) (0.6)
Depreciation and amortization (5.0) (4.7) (9.8) (9.5)
Operating Segments | Investment Companies - Compliance and Communications Management        
Segment Reporting Information [Line Items]        
Net sales 28.9 32.4 59.9 65.0
Cost of sales [1] 13.6 15.8 28.4 32.0
SG&A expenses [1] 3.4 4.0 7.5 8.2
Other segment items [1] 0.0 0.0 0.0  
Segment Adjusted EBITDA, Total 11.9 12.6 24.0 24.8
Restructuring, impairment and other charges, net (0.1) (0.4) (0.2) (0.5)
Depreciation and amortization (0.7) (1.0) (1.7) (1.9)
Operating Segments | Reportable Segment, Aggregation before Other Operating Segment [Member]        
Segment Reporting Information [Line Items]        
Segment Adjusted EBITDA, Total 90.4 86.0 168.5 161.6
Corporate        
Segment Reporting Information [Line Items]        
Corporate [2] (8.1) (9.7) (15.6) (17.1)
Restructuring, impairment and other charges, net (0.9) (0.1) (1.1) (0.4)
Depreciation and amortization $ 0.0 $ 0.0 $ 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.