Income Taxes (Earnings Before Income Taxes by Geographical Area) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosure [Abstract]
United States	$ 136,280	$ 180,753	$ 211,267
Other countries	109,519	101,128	109,345
Earnings before income taxes	$ 245,799	$ 281,881	$ 320,612