Income Taxes (Tax Expense and Effective Tax Rate) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Income Tax Disclosure [Abstract]
Earnings before income taxes	$ 40,241	$ 54,096	$ 71,990	$ 91,842
Income tax expense	$ 4,730	$ 6,190	$ 6,873	$ 13,631
Effective tax rate	11.80%	11.40%	9.50%	14.80%