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Revenue from Contracts with Customers - Narrative (Details) - USD ($)
3 Months Ended 6 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2024
Mar. 31, 2023
Revenue from Contract with Customer [Abstract]        
Amortization of capitalized contract acquisition costs $ 8,900,000 $ 9,400,000 $ 18,015,000 $ 19,134,000
Capitalized Contract Cost, Impairment Loss     $ 0 $ 0