Income Tax Expense - Components Of Income From Continuing Operations Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Income Tax Expense
United States	$ 90,674	$ 70,214	$ 23,951
Foreign	15,761	10,457	12,455
Total income before income taxes	$ 106,435	$ 80,671	$ 36,406