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Acquisitions and Disposition of Business - Schedule of Unaudited Pro Forma Financial Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2023 | Mar. 31, 2022
Business Acquisition [Line Items] |  |  |  |
Revenue | $ 542,181 | $ 546,685 | $ 1,051,776 | $ 1,044,400
Net income | $ 74,805 | $ 71,839 | $ 132,436 | $ 76,591

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