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	78,211										78,211
Other comprehensive earnings (loss), net of tax	2,482					(6,764)	8,154	1,092	2,482
Cash dividends paid	(22,134)										(22,134)
Sales of treasury stock	19,513		$ 18,040		1,473
Sales of treasury stock, shares			405,000
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	(272,099)		$ (272,099)
Purchases of treasury stock, shares			(2,280,000)
Stock-based compensation	13,957				13,957
Purchases/transfers of stock by/to deferred compensation				$ (115)						115
Purchases and transfer of stock by/to deferred compensation, shares				(2,000)
Distribution of stock from deferred compensation plan				$ 1,386						(1,386)
Distribution of stock from deferred compensation plan, shares				29,000
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
Balances at Dec. 31, 2021	2,223,432	$ 106	$ (606,207)	$ (7,960)	274,366	(35,257)	(23,383)	(6,764)	(65,404)	7,960	2,620,571
Balance, Common Stock, shares at Dec. 31, 2021		72,960,000
Balance, Treasury Stock, shares at Dec. 31, 2021			9,877,000
Balance, Treasury stock held for deferred compensation, shares at Dec. 31, 2021				167,000
Net earnings	47,906										47,906
Other comprehensive earnings (loss), net of tax	2,267					(4,411)	5,940	738	2,267
Cash dividends paid	(11,887)										(11,887)
Sales of treasury stock	16,285		$ 15,551		734
Sales of treasury stock, shares			347,000
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	(245,357)		$ (245,357)
Purchases of treasury stock, shares			2,047,000
Stock-based compensation	2,065				2,065
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				$ 1,350						(1,350)
Distribution of stock from deferred compensation plan, shares				28,000
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
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	$ 65,117										65,117
Other comprehensive earnings (loss), net of tax	47,945					36,562	10,788	595	47,945
Cash dividends paid	(24,537)										(24,537)
Sales of treasury stock	13,771		$ 12,351		1,420
Sales of treasury stock, shares			270,000
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	15,538				15,538
Purchases/transfers of stock by/to deferred compensation				$ (112)						112
Purchases and transfer of stock by/to deferred compensation, shares				(1,000)
Distribution of stock from deferred compensation plan				$ 3,574						(3,574)
Distribution of stock from deferred compensation plan, shares				73,000
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	72,960,000
Balance, Treasury Stock, shares at Mar. 31, 2023	(13,022,000)		13,022,000
Balance, Treasury stock held for deferred compensation, shares at Mar. 31, 2023	(67,000)			67,000
Balances at Dec. 31, 2022	$ 1,939,435	$ 106	$ (1,052,623)	$ (5,975)	305,100	(58,548)	(730)	646	(58,632)	5,975	2,745,484
Balance, Common Stock, shares at Dec. 31, 2022		72,960,000
Balance, Treasury Stock, shares at Dec. 31, 2022			13,460,000
Balance, Treasury stock held for deferred compensation, shares at Dec. 31, 2022				122,000
Net earnings	35,511										35,511
Other comprehensive earnings (loss), net of tax	14,014					8,616	5,303	95	14,014
Cash dividends paid	(13,182)										(13,182)
Sales of treasury stock	12,747		$ 11,488		1,259
Sales of treasury stock, shares			251,000
Common shares issued for benefit plans	19,307		$ 8,447		10,860
Common shares issued for benefit plans, shares			187,000
Stock-based compensation	4,222				4,222
Purchases/transfers of stock by/to deferred compensation				$ (42)						42
Distribution of stock from deferred compensation plan				$ 2,698						(2,698)
Distribution of stock from deferred compensation plan, shares				55,000
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	72,960,000
Balance, Treasury Stock, shares at Mar. 31, 2023	(13,022,000)		13,022,000
Balance, Treasury stock held for deferred compensation, shares at Mar. 31, 2023	(67,000)			67,000