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Goodwill - Summary of Changes to Goodwill (Detail) $ in Thousands	6 Months Ended
	Mar. 31, 2025 USD ($)
Goodwill [Roll Forward]
Balance at September 30, 2024	$ 782,752
Foreign currency translation adjustment	(3,473)
Balance at March 31, 2025	779,279
Scores
Goodwill [Roll Forward]
Balance at September 30, 2024	146,648
Foreign currency translation adjustment	0
Balance at March 31, 2025	146,648
Software
Goodwill [Roll Forward]
Balance at September 30, 2024	636,104
Foreign currency translation adjustment	(3,473)
Balance at March 31, 2025	$ 632,631

X

- Definition

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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X

- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) asset representing future economic benefit from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

+ References

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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