Condensed Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data	Total stockholders equity	Common Stock [Member]	Additional Paid-in Capital [Member]	Total Accumulated Other Comprehensive (Loss) Earnings [Member]	Foreign Currency Translation Adjustments [Member]	Unrealized Derivative Gains (Losses) [Member]	Minimum Retirement Benefit Liability Adjustments [Member]	Deferred Compensation in Equity [Member]	Retained Earnings [Member]	Treasury Stock at Cost [Member]	Treasury Stock Held for Deferred Compensaton [Member]	Total
Balances at Sep. 30, 2012	$ 1,008,115	$ 106	$ 97,826	$ (11,723)	$ 17,447	$ (376)	$ (28,794)	$ 4,344	$ 1,069,811	$ (147,905)	$ (4,344)
Balance, Treasury Stock, shares at Sep. 30, 2012										(4,536,000)
Balance, Common Stock, shares at Sep. 30, 2012		72,960,000
Balance, Treasury stock held for deferred compensation, Shares at Sep. 30, 2012											(276,000)
Net earnings	93,477								93,477			93,477
Other Comprehensive Income (Loss), Net of Tax	(2,099)			(2,099)	(4,196)	418	1,679
Cash dividends paid	(16,421)								(16,421)
Purchases of treasury stock	(51,846)									(51,846)
Purchases of treasury stock, shares										(1,395,000)
Sales of treasury stock	9,986		(12,653)							22,639
Sales of treasury stock, shares										750,000
Common shares issued from treasury stock for benefit plans	9,780		1,923							7,857
Common shares issued from treasury stock for benefit plans, shares										250,000
Tax benefit attributable to exercise of stock options	4,755		4,755
Stock-based compensation	7,355		7,355
Transfer of stock to deferred compensation plan	98		24					97		74	(97)
Transfer of stock to deferred compensation plan, shares										2,000	(2,000)
Purchases of stock by deferred compensation plan								61			(61)
Purchases of stock by deferred compensation plan, shares											(2,000)
Distribution of stock from deferred compensation plan								(440)			440
Distribution of stock from deferred compensation plan, shares											42,000
Balances at Jun. 30, 2013	1,063,200	106	99,230	(13,822)	13,251	42	(27,115)	4,062	1,146,867	(169,181)	(4,062)
Balance, Treasury Stock, shares at Jun. 30, 2013										(4,929,000)
Balance, Common Stock, shares at Jun. 30, 2013		72,960,000
Balance, Treasury stock held for deferred compensation, Shares at Jun. 30, 2013											(238,000)
Balances at Sep. 30, 2013	1,142,545	106	101,147	15,115	25,742	43	(10,670)	4,007	1,193,887	(167,710)	(4,007)	1,142,545
Balance, Treasury Stock, shares at Sep. 30, 2013										(4,883,000)		(4,883,000)
Balance, Common Stock, shares at Sep. 30, 2013		72,960,000										72,960,000
Balance, Preferred Stock, shares at Sep. 30, 2013												0
Balance, Treasury stock held for deferred compensation, Shares at Sep. 30, 2013											(232,000)	(232,000)
Net earnings	114,182								114,182			114,182
Other Comprehensive Income (Loss), Net of Tax	4,876			4,876	4,527	46	303
Cash dividends paid	(16,021)								(16,021)
Purchases of treasury stock	(143,073)									(143,073)
Purchases of treasury stock, shares										(3,309,000)
Sales of treasury stock	9,093		(4,949)							14,042
Sales of treasury stock, shares										455,000
Common shares issued from treasury stock for benefit plans	11,193		2,837							8,356
Common shares issued from treasury stock for benefit plans, shares										260,000
Tax benefit attributable to exercise of stock options	2,463		2,463
Stock-based compensation	8,739		8,739
Purchases of stock by deferred compensation plan								324			(324)
Purchases of stock by deferred compensation plan, shares											(7,000)
Distribution of stock from deferred compensation plan								(453)			453
Distribution of stock from deferred compensation plan, shares											41,000
Balances at Jun. 30, 2014	$ 1,133,997	$ 106	$ 110,237	$ 19,991	$ 30,269	$ 89	$ (10,367)	$ 3,878	$ 1,292,048	$ (288,385)	$ (3,878)	$ 1,133,997
Balance, Treasury Stock, shares at Jun. 30, 2014										(7,477,000)		(7,477,000)
Balance, Common Stock, shares at Jun. 30, 2014		72,960,000										72,960,000
Balance, Preferred Stock, shares at Jun. 30, 2014												0
Balance, Treasury stock held for deferred compensation, Shares at Jun. 30, 2014											(198,000)	(198,000)