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Segment Information -Summary of Depreciation and Amortization on Property and Equipment (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2023
Segment Reporting Information [Line Items] |  |  |
Total depreciation and amortization | $ 10,658 | $ 9,398 | $ 10,106
Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Total depreciation and amortization | 10,583 | 9,332 | 10,035
Operating Segments | Scores |  |  |
Segment Reporting Information [Line Items] |  |  |
Total depreciation and amortization | 512 | 451 | 485
Operating Segments | Software |  |  |
Segment Reporting Information [Line Items] |  |  |
Total depreciation and amortization | 10,071 | 8,881 | 9,550
Unallocated corporate |  |  |
Segment Reporting Information [Line Items] |  |  |
Total depreciation and amortization | $ 75 | $ 66 | $ 71

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