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