Goodwill - Summary of Changes to Goodwill (Detail) $ in Thousands	3 Months Ended
	Dec. 31, 2024 USD ($)
Goodwill [Roll Forward]
Balance at September 30, 2024	$ 782,752
Foreign currency translation adjustment	(7,201)
Balance at December 31, 2024	775,551
Scores
Goodwill [Roll Forward]
Balance at September 30, 2024	146,648
Foreign currency translation adjustment	0
Balance at December 31, 2024	146,648
Software
Goodwill [Roll Forward]
Balance at September 30, 2024	636,104
Foreign currency translation adjustment	(7,201)
Balance at December 31, 2024	$ 628,903