Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [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]	Treasury Stock at Cost [Member]	Treasury Stock Held for Deferred Compensation [Member]
Balances at Sep. 30, 2023	$ 2,070,989	$ 106	$ 327,941	$ (67,393)	$ (9,719)	$ 6,441	$ (70,671)	$ 2,776	$ 2,908,574	$ (1,094,961)	$ (2,776)
Net earnings	187,600								187,600
Other comprehensive earnings (loss), net of tax	9,270			11,015	(1,723)	(22)	9,270
Cash dividends paid	(28,327)								(28,327)
Sales of treasury stock	48,091		12,468							35,623
Common shares issued for benefit plans	21,887		13,966							7,921
Stock-based compensation	19,903		19,903
Purchases of stock by deferred compensation								79			(79)
Distribution of stock from deferred compensation								177			(177)
Balances at Mar. 31, 2024	2,329,413	106	374,278	(56,378)	(11,442)	6,419	(61,401)	3,032	3,067,847	(1,051,417)	(3,032)
Balances at Dec. 31, 2023	2,190,062	106	337,038	(45,705)	(10,330)	6,651	(49,384)	3,049	2,985,409	(1,083,107)	(3,049)
Net earnings	97,556								97,556
Other comprehensive earnings (loss), net of tax	(12,017)			(10,673)	(1,112)	(232)	(12,017)
Cash dividends paid	(15,118)								(15,118)
Sales of treasury stock	32,077		8,308							23,769
Common shares issued for benefit plans	21,887		13,966							7,921
Stock-based compensation	14,966		14,966
Purchases of stock by deferred compensation								47			(47)
Distribution of stock from deferred compensation								(64)			64
Balances at Mar. 31, 2024	2,329,413	106	374,278	(56,378)	(11,442)	6,419	(61,401)	3,032	3,067,847	(1,051,417)	(3,032)
Balances at Sep. 30, 2024	2,176,416	106	396,554	(39,129)	(5,177)	11,608	(32,698)	2,662	3,223,259	(1,410,805)	(2,662)
Net earnings	196,040								196,040
Other comprehensive earnings (loss), net of tax	(17,780)			(15,523)	(2,157)	(100)	(17,780)
Cash dividends paid	(31,453)								(31,453)
Sales of treasury stock	49,489		14,844							34,645
Purchases of treasury stock	(79,493)									(79,493)
Common shares issued for benefit plans	24,912		18,378							6,534
Stock-based compensation	19,376		19,376
Purchases of stock by deferred compensation								82			(82)
Distribution of stock from deferred compensation								(981)			981
Balances at Mar. 31, 2025	2,337,507	106	449,152	(54,652)	(7,334)	11,508	(50,478)	1,763	3,387,846	(1,449,119)	(1,763)
Balances at Dec. 31, 2024	2,208,421	106	414,175	(72,514)	(12,492)	11,297	(73,709)	1,752	3,295,569	(1,427,720)	(1,752)
Net earnings	108,949								108,949
Other comprehensive earnings (loss), net of tax	23,231			17,862	5,158	211	23,231
Cash dividends paid	(16,672)								(16,672)
Sales of treasury stock	20,830		4,504							16,326
Purchases of treasury stock	(44,020)									(44,020)
Common shares issued for benefit plans	24,058		17,763							6,295
Stock-based compensation	12,710		12,710
Purchases of stock by deferred compensation								34			(34)
Distribution of stock from deferred compensation								(23)			23
Balances at Mar. 31, 2025	$ 2,337,507	$ 106	$ 449,152	$ (54,652)	$ (7,334)	$ 11,508	$ (50,478)	$ 1,763	$ 3,387,846	$ (1,449,119)	$ (1,763)