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	90,044								90,044
Other comprehensive earnings (loss), net of tax	21,287			21,688	(611)	210	21,287
Cash dividends paid	(13,209)								(13,209)
Sales of treasury stock	6,014		4,160							11,854
Stock-based compensation	4,937		4,937
Purchases of stock by deferred compensation								32			(32)
Distribution of stock from deferred compensation								241			(241)
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)
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	87,091								87,091
Other comprehensive earnings (loss), net of tax	(41,011)			(33,385)	(7,315)	(311)	(41,011)
Cash dividends paid	(14,781)								(14,781)
Sales of treasury stock	28,659		10,340							18,319
Purchases of treasury stock	(35,473)									(35,473)
Common shares issued for benefit plans	854		615							239
Stock-based compensation	6,666		6,666
Purchases of stock by deferred compensation								48			(48)
Distribution of stock from deferred compensation								(958)			958
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)