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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	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Numerator:
Net earnings	$ 442,111	$ 372,971	$ 232,368
Denominator:
Basic shares outstanding	59,563	60,076	59,908
Dilutive effect of stock options; restricted and performance stock	1,901	2,008	1,574
Diluted shares outstanding	61,464	62,084	61,482
Income per common share:
Basic earnings per share	$ 7.42	$ 6.21	$ 3.88
Diluted earnings per share	$ 7.19	$ 6.01	$ 3.78

X

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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