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, 2020	$ 1,992,677	$ 106	$ (577,476)	$ (9,222)	$ 231,936	$ (40,691)	$ (20,457)	$ (28,646)	$ (89,794)	$ 9,222	$ 2,427,905
Balance, Common Stock, shares at Sep. 30, 2020		72,960,000
Balance, Treasury Stock, shares at Sep. 30, 2020			10,277,000
Balance, Treasury stock held for deferred compensation, shares at Sep. 30, 2020				(199,000)
Net Income (Loss)	208,649										208,649
Other comprehensive earnings (loss), net of tax	24,175					7,787	(5,140)	21,528	24,175
Cash dividends paid	(36,041)										(36,041)
Purchases of treasury stock	(45,860)		$ (45,860)
Purchases of treasury stock, shares			(404,000)
Sales of treasury stock	34,806		$ 36,024		(1,218)
Sales of treasury stock, shares			851,000
Common shares issued for benefit plans	14,900		$ 5,358		9,542
Common shares issued for benefit plans, shares			128,000
Stock-based compensation	21,475				21,475
Purchases and transfers of stock by/to deferred compensation plan				$ (393)						393
Purchases and transfer of stock by/to deferred compensation plan, shares				(3,000)
Distribution of stock from deferred compensation plan				$ 1,666						(1,666)
Distribution of stock from deferred compensation plan, shares				35,000
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
Balance, Common Stock, shares at Sep. 30, 2021		72,960,000
Balance, Treasury Stock, shares at Sep. 30, 2021			9,702,000
Balance, Treasury stock held for deferred compensation, shares at Sep. 30, 2021				(167,000)
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)
Purchases of treasury stock, shares			(4,123,000)
Sales of treasury stock	22,108		$ 20,977		1,131
Sales of treasury stock, shares			468,000
Common shares issued for benefit plans	17,132		$ 6,567		10,565
Common shares issued for benefit plans, shares			150,000
Stock-based compensation	20,109				20,109
Purchases and transfers of stock by/to deferred compensation plan				$ (252)						252
Purchases and transfer of stock by/to deferred compensation plan, shares				(3,000)
Distribution of stock from deferred compensation plan				$ 1,420						(1,420)
Distribution of stock from deferred compensation plan, shares				31,000
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
Balance, Common Stock, shares at Sep. 30, 2022	72,960,000	72,960,000
Balance, Treasury Stock, shares at Sep. 30, 2022	(13,207,000)		13,207,000
Balance, Treasury stock held for deferred compensation, shares at Sep. 30, 2022	(139,000)			139,000
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)
Purchases of treasury stock, shares			(1,060,000)
Sales of treasury stock	50,467		$ 50,090		377
Sales of treasury stock, shares			1,009,000
Common shares issued for benefit plans	19,466		$ 8,523		10,943
Common shares issued for benefit plans, shares			188,000
Stock-based compensation	23,383				23,383
Purchases and transfers of stock by/to deferred compensation plan				$ (178)						178
Purchases and transfer of stock by/to deferred compensation plan, shares				(2,000)
Distribution of stock from deferred compensation plan				$ 4,183						(4,183)
Distribution of stock from deferred compensation plan, shares				86,000
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
Balance, Common Stock, shares at Sep. 30, 2023	72,960,000	72,960,000
Balance, Treasury Stock, shares at Sep. 30, 2023	(13,070,000)		13,070,000
Balance, Treasury stock held for deferred compensation, shares at Sep. 30, 2023	(55,000)			55,000