Earnings Per Share (Reconciliation of Net Earnings to Net Earnings Per Share Basic and Diluted) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Numerator:
Net earnings	$ 29,606	$ 30,305
Denominator:
Basic shares outstanding	59,667	63,094
Dilutive effect of stock options and restricted stock	1,261	2,005
Diluted shares outstanding	60,928	65,099
Income per common share:
Basic earnings per share	$ 0.50	$ 0.48
Diluted earnings per share	$ 0.49	$ 0.47