Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Treasury Stock at Cost [Member]	Treasury Stock Held for Deferred Compensation [Member]	Additional Paid-in Capital [Member]	Foreign Currency Translation Adjustments [Member]	Unrealized Derivative Gains (Losses) [Member]	Minimum Retirement Benefit Liability Adjustments [Member]	Total Accumulated Other Comprehensive (Loss) Earnings [Member]	Deferred Compensation [Member]	Retained Earnings [Member]
Balances at Sep. 30, 2021	$ 2,214,781	$ 106	$ (581,954)	$ (7,949)	$ 261,735	$ (32,904)	$ (25,597)	$ (7,118)	$ (65,619)	$ 7,949	$ 2,600,513
Net Income (Loss)	171,698										171,698
Other comprehensive earnings (loss), net of tax	(26,944)					(53,590)	19,382	7,264	(26,944)
Cash dividends paid	(44,978)										(44,978)
Purchases of treasury stock	(472,784)		(472,784)
Sales of treasury stock	22,108		20,977		1,131
Common shares issued for benefit plans	17,132		6,567		10,565
Stock-based compensation	20,109				20,109
Purchases of stock by deferred compensation				(252)						252
Distribution of stock from deferred compensation				1,420						(1,420)
Balances at Sep. 30, 2022	1,901,122	106	(1,027,194)	(6,781)	293,540	(86,494)	(6,215)	146	(92,563)	6,781	2,727,233
Net Income (Loss)	232,368										232,368
Other comprehensive earnings (loss), net of tax	21,892					19,101	(3,504)	6,295	21,892
Cash dividends paid	(51,027)										(51,027)
Purchases of treasury stock	(126,682)		(126,380)		(302)
Sales of treasury stock	50,467		50,090		377
Common shares issued for benefit plans	19,466		8,523		10,943
Stock-based compensation	23,383				23,383
Purchases of stock by deferred compensation				(178)						178
Distribution of stock from deferred compensation				4,183						(4,183)
Balances at Sep. 30, 2023	2,070,989	106	(1,094,961)	(2,776)	327,941	(67,393)	(9,719)	6,441	(70,671)	2,776	2,908,574
Net Income (Loss)	372,971										372,971
Other comprehensive earnings (loss), net of tax	37,973					28,264	4,542	5,167	37,973
Cash dividends paid	(58,286)										(58,286)
Purchases of treasury stock	(393,593)		(390,819)		(2,774)
Sales of treasury stock	91,421		67,053		24,368
Common shares issued for benefit plans	21,889		7,922		13,967
Stock-based compensation	33,052				33,052
Purchases of stock by deferred compensation				(173)						173
Distribution of stock from deferred compensation				287						(287)
Balances at Sep. 30, 2024	$ 2,176,416	$ 106	$ (1,410,805)	$ (2,662)	$ 396,554	$ (39,129)	$ (5,177)	$ 11,608	$ (32,698)	$ 2,662	$ 3,223,259