Goodwill and Intangible Assets - Summary of Changes to Goodwill (Detail) $ in Thousands	9 Months Ended
	Jun. 30, 2022 USD ($)
Goodwill [Roll Forward]
Balance at September 30, 2021	$ 788,185
Foreign currency translation adjustment	(15,512)
Balance at June 30, 2022	772,673
Scores
Goodwill [Roll Forward]
Balance at September 30, 2021	146,648
Foreign currency translation adjustment	0
Balance at June 30, 2022	146,648
Software
Goodwill [Roll Forward]
Balance at September 30, 2021	641,537
Foreign currency translation adjustment	(15,512)
Balance at June 30, 2022	$ 626,025