Income Taxes (Tax Expense and Effective Tax Rate) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Earnings before income taxes	$ 37,746	$ 47,584
Income tax expense	$ 7,441	$ 6,014
Effective tax rate	19.70%	12.60%