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Revenue Recognition - Summary of Changes in Allowance for Credit Losses (Detail)
$ in Thousands
12 Months Ended
Sep. 30, 2022
USD ($)
Revenue from Contract with Customer [Abstract]  
Balance at September 30, 2021 $ 4,779
Current period provision 5,411
Write-offs, net and other (2,435)
Balance as of September 30, 2022 $ 7,755