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	30,305										30,305
Other comprehensive earnings (loss), net of tax	215					(2,353)	2,214	354	215
Cash dividends paid	(10,247)										(10,247)
Sales of treasury stock	3,228		$ 2,489		739
Sales of treasury stock, shares			58,000
Purchases of treasury stock	(26,742)		$ (26,742)
Purchases of treasury stock, shares			(233,000)
Stock-based compensation	11,892				11,892
Purchases/transfers of stock by/to deferred compensation				$ (47)						47
Purchases and transfer of stock by/to deferred compensation, shares				(1,000)
Distribution of stock from deferred compensation plan				$ 36						(36)
Distribution of stock from deferred compensation plan, shares				1,000
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)
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	$ 29,606										29,606
Other comprehensive earnings (loss), net of tax	33,931					27,946	5,485	500	33,931
Cash dividends paid	(11,355)										(11,355)
Sales of treasury stock	1,024		$ 863		161
Sales of treasury stock, shares			19,000
Purchases of treasury stock	(26,369)		$ (26,369)
Purchases of treasury stock, shares			(274,000)
Common shares issued for benefit plans	160		$ 77		83
Common shares issued for benefit plans, shares			2,000
Stock-based compensation	11,316				11,316
Purchases/transfers of stock by/to deferred compensation				$ (70)						70
Purchases and transfer of stock by/to deferred compensation, shares				(1,000)
Distribution of stock from deferred compensation plan				$ 876						(876)
Distribution of stock from deferred compensation plan, shares				18,000
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	72,960,000
Balance, Treasury Stock, shares at Dec. 31, 2022	(13,460,000)		(13,460,000)
Balance, Treasury stock held for deferred compensation, shares at Dec. 31, 2022	(122,000)			(122,000)