| Fiscal period | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 |
| Period End Date | 12/31/2025 | 12/31/2024 | 12/31/2023 | 12/31/2022 | 12/31/2021 | 12/31/2020 | 12/31/2019 | 12/31/2018 | 12/31/2017 | 12/31/2016 |
| Revenues: Professional services | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Revenues: Processing and related services | -- | -- | -- | -- | -- | -- | -- | -- | 651.01 | 606.94 |
| Revenues: Software, maintenance and services | -- | -- | -- | -- | -- | -- | 52.36 | 58.10 | 62.89 | 79.40 |
| Revenues: Software | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Revenue-Cloud and related solutions | -- | -- | -- | -- | -- | -- | 896.16 | 766.38 | -- | -- |
| Revenues | 1,223.29 | 1,197.25 | 1,169.26 | 1,089.75 | 1,046.49 | 990.53 | -- | -- | -- | -- |
| Revenues: Maintenance | -- | -- | -- | -- | -- | -- | 48.28 | 50.58 | 75.68 | 74.62 |
| Revenues: Charge for arbitration ruling attributable | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Total Revenues | 1,223.29 | 1,197.25 | 1,169.26 | 1,089.75 | 1,046.49 | 990.53 | 996.81 | 875.06 | 789.58 | 760.96 |
| Cost of revenues: Processing and related services | -- | -- | -- | -- | -- | -- | -- | -- | 315.01 | 282.95 |
| Cost of revenues: Software, maintenance and services | -- | -- | -- | -- | -- | -- | 31.72 | 34.87 | 39.02 | 49.20 |
| Cost of Revenues: Cost of professional services | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Cost of revenues: Maintenance | -- | -- | -- | -- | -- | -- | 21.01 | 22.15 | 40.79 | 42.99 |
| Cost of revenues | 623.57 | 614.46 | 615.04 | 565.17 | 543.21 | 535.60 | -- | -- | -- | -- |
| Cost of revenues: Cloud and related solutions | -- | -- | -- | -- | -- | -- | 472.39 | 392.80 | -- | -- |
| Depreciation | 18.11 | 21.62 | 23.19 | 23.60 | 24.84 | 22.93 | 21.42 | 18.30 | 13.38 | 13.62 |
| Amortization of noncompete agreements and goodwill | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Research and development | 161.57 | 158.19 | 143.20 | 137.91 | 134.69 | 122.85 | 127.99 | 124.03 | 113.22 | 98.68 |
| Selling, general and administrative | 281.48 | 258.31 | 247.61 | 238.02 | 214.69 | 198.28 | 191.33 | 169.31 | 153.70 | 140.47 |
| Kenan Business acquisition-related charges | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Restructuring charges | 19.82 | 13.32 | 16.34 | 46.31 | 4.87 | 5.33 | 4.83 | 8.66 | 8.80 | 0.42 |
| Total Operating Expenses | 1,104.54 | 1,065.92 | 1,045.38 | 1,011.01 | 922.30 | 884.98 | 870.70 | 770.13 | 683.90 | 628.33 |
| Operating Income (loss) | 118.75 | 131.33 | 123.88 | 78.75 | 124.19 | 105.56 | 126.11 | 104.93 | 105.69 | 132.63 |
| Interest expense | 28.95 | 30.47 | 31.18 | 16.43 | 14.57 | 15.50 | 17.75 | 17.67 | 16.79 | 16.26 |
| Gain on repurchase of convertible debt securities | -- | -- | -- | -- | -- | -- | -- | -- | -- | (8.65) |
| Interest and investment income, net | 5.20 | 8.69 | 4.34 | 0.88 | 0.37 | 1.24 | 1.79 | 2.65 | 3.25 | 2.46 |
| Other income (loss) net | (3.85) | 2.72 | (4.69) | 5.05 | (6.02) | (2.96) | (1.60) | 0.55 | (1.64) | (5.31) |
| Write-off of deferred financing costs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Gain (loss) on foreign currency transactions | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Amortization of original issue discount | -- | -- | -- | 0.00 | (3.02) | (2.98) | (2.82) | (2.66) | (2.79) | (4.87) |
| Loss on extinguishment of debt | (0.45) | -- | -- | -- | -- | -- | -- | (0.81) | -- | -- |
| Loss on derivative liability upon debt conversion | -- | -- | -- | (7.46) | -- | -- | -- | -- | -- | -- |
| Total other | (28.05) | (19.06) | (31.53) | (17.97) | -- | (20.20) | (20.39) | (17.95) | (17.98) | (32.63) |
| Income (loss) from continuing operations before income taxes | 90.70 | 112.27 | 92.35 | 60.78 | 100.95 | 85.36 | 105.72 | 86.99 | 87.71 | 100.00 |
| Current- Foreign | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Current: Federal | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Current: State | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income tax (benefit) provision | 34.82 | 25.42 | 26.11 | 16.72 | 28.62 | 26.65 | 22.95 | 20.86 | 26.35 | 37.12 |
| Deferred: Federal | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Deferred: State | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Deferred: Foreign | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income (loss) from Continuing Operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Discontinued operations: Income (loss) from discontinued operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Discontinued operations: Income tax (provision) benefit | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Net Income (Loss) Available to Common Shareholders | 55.88 | 86.85 | 66.25 | 44.06 | 72.33 | 58.71 | 82.77 | 66.13 | 61.36 | 62.88 |
| EPS (BASIC): Income (loss) from continuing operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| EPS (BASIC): Discontinued operations, net of tax | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Net Earnings Per Share (Basic) | 2.02 | 3.06 | 2.21 | 1.42 | 2.28 | 1.83 | 2.58 | 2.04 | 1.89 | 2.03 |
| EPS (DILUTED): Income (loss) from continuing operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| EPS (DILUTED): Discontinued operations, net of tax | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Net Earnings Per Share (Diluted) | 1.98 | 3.03 | 2.20 | 1.41 | 2.26 | 1.82 | 2.55 | 2.01 | 1.87 | 1.90 |
| Weighted Average Shares Outstanding (Basic) | 27.69 | 28.35 | 29.94 | 31.03 | 31.78 | 32.01 | 32.05 | 32.49 | 32.42 | 30.97 |
| Weighted Average Shares Outstanding (Diluted) | 28.22 | 28.67 | 30.12 | 31.30 | 32.01 | 32.28 | 32.47 | 32.86 | 32.87 | 33.01 |