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, 2011	$ 919,097	$ 106	$ 81,453	$ 3,626	$ 22,103	$ (484)	$ (17,993)	$ 4,581	$ 949,573	$ (115,661)	$ (4,581)
Balance, Treasury Stock, shares at Sep. 30, 2011										(4,070,000)
Balance, Common Stock, shares at Sep. 30, 2011		72,960,000
Balance, Treasury stock held for deferred compensation, Shares at Sep. 30, 2011											(315,000)
Net earnings	95,470								95,470			95,470
Cash dividends paid	(15,855)								(15,855)
Purchases of treasury stock	(31,881)									(31,881)
Purchases of treasury stock, shares										(792,000)
Sales of treasury stock	5,646		(1,295)							6,941
Sales of treasury stock, shares										418,000
Common shares issued from treasury stock for benefit plans	9,335		5,238							4,097
Common shares issued from treasury stock for benefit plans, shares										209,000
Tax benefit attributable to exercise of stock options	3,778		3,778
Stock-based compensation	6,680		6,680
Purchases of stock by deferred compensation plan	108		59					179		49	(179)
Purchases of stock by deferred compensation plan, shares										3,000	(4,000)
Distribution of stock from deferred compensation plan								(437)			437
Distribution of stock from deferred compensation plan, shares											44,000
Foreign currency translation adjustments	(14,018)			(14,018)	(14,018)
Reclassification of unrecognized derivative losses to earnings	131			131		131						131
Unrealized gain on derivatives arising during the period												0
Minimum retirement benefits liability adjustments	141			141			141					141
Taxes on changes in accumulated other comprehensive earnings	2,027			2,027	2,127	(50)	(50)
Balances at Jun. 30, 2012	980,659	106	95,913	(8,093)	10,212	(403)	(17,902)	4,323	1,029,188	(136,455)	(4,323)
Balance, Treasury Stock, shares at Jun. 30, 2012										(4,232,000)
Balance, Common Stock, shares at Jun. 30, 2012		72,960,000
Balance, Treasury stock held for deferred compensation, Shares at Jun. 30, 2012											(275,000)
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)	1,008,115
Balance, Treasury Stock, shares at Sep. 30, 2012										(4,536,000)		(4,536,000)
Balance, Common Stock, shares at Sep. 30, 2012		72,960,000										72,960,000
Balance, Preferred Stock, shares at Sep. 30, 2012												0
Balance, Treasury stock held for deferred compensation, Shares at Sep. 30, 2012											(276,000)	(276,000)
Net earnings	93,477								93,477			93,477
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
Purchases of stock by deferred compensation plan	98		24					158		74	(158)
Purchases of stock by deferred compensation plan, shares										2,000	(4,000)
Distribution of stock from deferred compensation plan								(440)			440
Distribution of stock from deferred compensation plan, shares											42,000
Foreign currency translation adjustments	(5,002)			(5,002)	(5,002)
Reclassification of unrecognized derivative losses to earnings	128			128		128						128
Unrealized gain on derivatives arising during the period	546			546		546						546
Minimum retirement benefits liability adjustments	2,618			2,618			2,618					2,618
Taxes on changes in accumulated other comprehensive earnings	(389)			(389)	806	(256)	(939)
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)	$ 1,063,200
Balance, Treasury Stock, shares at Jun. 30, 2013										(4,929,000)		(4,929,000)
Balance, Common Stock, shares at Jun. 30, 2013		72,960,000										72,960,000
Balance, Preferred Stock, shares at Jun. 30, 2013												0
Balance, Treasury stock held for deferred compensation, Shares at Jun. 30, 2013											(238,000)	(238,000)