Revenue Recognition - Summary of Changes in Allowance for Credit Losses (Detail) $ in Thousands	9 Months Ended
	Jun. 30, 2023 USD ($)
Revenue from Contract with Customer [Abstract]
Balance at September 30, 2022	$ 7,755
Current period provision	8,510
Write-offs, net and other	(3,714)
Balance as of June 30, 2023	$ 12,551