Segment Information -Summary of Depreciation and Amortization on Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	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