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		9 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Numerator:
Net earnings	$ 108,448	$ 102,075	$ 304,488	$ 289,675
Denominator:
Basic shares outstanding	59,680	60,425	59,442	60,290
Dilutive effect of stock options; restricted and performance stock	1,808	2,097	1,932	2,005
Diluted shares outstanding	61,488	62,522	61,374	62,295
Income per common share:
Basic earnings per share	$ 1.82	$ 1.69	$ 5.12	$ 4.8
Diluted earnings per share	$ 1.76	$ 1.63	$ 4.96	$ 4.65