Income Taxes (Tax Expense and Effective Tax Rate) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Income Tax Disclosure [Abstract]
Earnings before income taxes	$ 132,963	$ 120,624	$ 234,817	$ 230,344
Income tax expense	$ 24,014	$ 23,068	$ 38,777	$ 42,744
Effective tax rate	18.10%	19.10%	16.50%	18.60%