Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Treasury Stock at Cost [Member]	Treasury Stock Held for Deferred Compensaton [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
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 earnings	117,657										117,657
Other comprehensive earnings (loss), net of tax	(16,123)					(33,949)	15,139	2,687	(16,123)
Cash dividends paid	(33,572)										(33,572)
Sales of treasury stock	20,283		$ 18,855		1,428
Sales of treasury stock, shares			423,000
Common shares issued for benefit plans	17,168		$ 6,567		10,601
Common shares issued for benefit plans, shares			150,000
Purchases of treasury stock	(427,717)		$ (427,717)
Purchases of treasury stock, shares			(3,674,000)
Stock-based compensation	17,136				17,136
Purchases/transfers of stock by/to deferred compensation				$ (183)						183
Purchases and transfer of stock by/to deferred compensation, shares				(2,000)
Distribution of stock from deferred compensation plan				$ 1,371						(1,371)
Distribution of stock from deferred compensation plan, shares				29,000
Balances at Jun. 30, 2022	1,909,613	$ 106	$ (984,249)	$ (6,761)	290,900	(66,853)	(10,458)	(4,431)	(81,742)	6,761	2,684,598
Balance, Common Stock, shares at Jun. 30, 2022		72,960,000
Balance, Treasury Stock, shares at Jun. 30, 2022			(12,803,000)
Balance, Treasury stock held for deferred compensation, shares at Jun. 30, 2022				(140,000)
Balances at Mar. 31, 2022	2,051,879	$ 106	$ (829,446)	$ (6,678)	287,766	(39,668)	(17,443)	(6,026)	(63,137)	6,678	2,656,590
Balance, Common Stock, shares at Mar. 31, 2022		72,960,000
Balance, Treasury Stock, shares at Mar. 31, 2022			(11,427,000)
Balance, Treasury stock held for deferred compensation, shares at Mar. 31, 2022				(140,000)
Net earnings	39,446										39,446
Other comprehensive earnings (loss), net of tax	18,605					(27,185)	6,985	1,595	(18,605)
Cash dividends paid	(11,438)										(11,438)
Sales of treasury stock	770		$ 815		(45)
Sales of treasury stock, shares			18,000
Purchases of treasury stock	(155,618)		$ (155,618)
Purchases of treasury stock, shares			(1,394,000)
Stock-based compensation	3,179				3,179
Purchases/transfers of stock by/to deferred compensation				$ (68)						68
Purchases and transfer of stock by/to deferred compensation, shares				(1,000)
Distribution of stock from deferred compensation plan				$ (15)						15
Distribution of stock from deferred compensation plan, shares				1,000
Balances at Jun. 30, 2022	1,909,613	$ 106	$ (984,249)	$ (6,761)	290,900	(66,853)	(10,458)	(4,431)	(81,742)	6,761	2,684,598
Balance, Common Stock, shares at Jun. 30, 2022		72,960,000
Balance, Treasury Stock, shares at Jun. 30, 2022			(12,803,000)
Balance, Treasury stock held for deferred compensation, shares at Jun. 30, 2022				(140,000)
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 earnings	$ 149,716										149,716
Other comprehensive earnings (loss), net of tax	31,635					30,694	403	538	31,635
Cash dividends paid	(37,762)										37,762
Sales of treasury stock	28,612		$ 25,752		2,860
Sales of treasury stock, shares			538,000
Common shares issued for benefit plans	19,467		$ 8,524		10,943
Common shares issued for benefit plans, shares			189,000
Purchases of treasury stock	(26,369)		$ (26,369)
Purchases of treasury stock, shares			(274,000)
Stock-based compensation	19,369				19,369
Purchases/transfers of stock by/to deferred compensation				$ (146)						146
Purchases and transfer of stock by/to deferred compensation, shares				(1,000)
Distribution of stock from deferred compensation plan				$ 4,110						(4,110)
Distribution of stock from deferred compensation plan, shares				84,000
Balances at Jun. 30, 2023	$ 2,085,790	$ 106	$ (1,019,287)	$ (2,817)	326,712	(55,800)	(5,812)	684	(60,928)	2,817	2,839,187
Balance, Common Stock, shares at Jun. 30, 2023	72,960,000	72,960,000
Balance, Treasury Stock, shares at Jun. 30, 2023	(12,754,000)		(12,754,000)
Balance, Treasury stock held for deferred compensation, shares at Jun. 30, 2023	(56,000)			(56,000)
Balances at Mar. 31, 2023	$ 2,012,054	$ 106	$ (1,032,688)	$ (3,319)	321,441	(49,932)	4,573	741	(44,618)	3,319	2,767,813
Balance, Common Stock, shares at Mar. 31, 2023		72,960,000
Balance, Treasury Stock, shares at Mar. 31, 2023			(13,022,000)
Balance, Treasury stock held for deferred compensation, shares at Mar. 31, 2023				(67,000)
Net earnings	84,599										84,599
Other comprehensive earnings (loss), net of tax	(16,310)					(5,868)	(10,385)	(57)	(16,310)
Cash dividends paid	(13,225)										(13,225)
Sales of treasury stock	14,841		$ 13,401		1,440
Sales of treasury stock, shares			268,000
Stock-based compensation	3,831				3,831
Purchases/transfers of stock by/to deferred compensation				$ (34)						34
Distribution of stock from deferred compensation plan				$ 536						(536)
Distribution of stock from deferred compensation plan, shares				11,000
Balances at Jun. 30, 2023	$ 2,085,790	$ 106	$ (1,019,287)	$ (2,817)	$ 326,712	$ (55,800)	$ (5,812)	$ 684	$ (60,928)	$ 2,817	$ 2,839,187
Balance, Common Stock, shares at Jun. 30, 2023	72,960,000	72,960,000
Balance, Treasury Stock, shares at Jun. 30, 2023	(12,754,000)		(12,754,000)
Balance, Treasury stock held for deferred compensation, shares at Jun. 30, 2023	(56,000)			(56,000)