Goodwill and Intangible Assets - Summary of Changes to Goodwill (Detail) $ in Thousands	3 Months Ended
	Dec. 31, 2021 USD ($)
Goodwill [Roll Forward]
Balance at September 30, 2021	$ 788,185
Foreign currency translation adjustment	(926)
Balance at December 31, 2021	787,259
Scores
Goodwill [Roll Forward]
Balance at September 30, 2021	146,648
Foreign currency translation adjustment	0
Balance at December 31, 2021	146,648
Software
Goodwill [Roll Forward]
Balance at September 30, 2021	641,537
Foreign currency translation adjustment	(926)
Balance at December 31, 2021	$ 640,611