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	69,814								69,814			69,814
Other Comprehensive Income (Loss), Net of Tax	(4,280)			(4,280)	(5,639)	53	1,306
Cash dividends paid	(10,966)								(10,966)
Purchases of treasury stock	(23,235)									(23,235)
Purchases of treasury stock, shares										(610,000)
Sales of treasury stock	9,083		(11,766)							20,849
Sales of treasury stock, shares										693,000
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	4,397		4,397
Stock-based compensation	5,379		5,379
Transfer of stock to deferred compensation plan	94		23					95		71	(95)
Transfer of stock to deferred compensation plan, shares										2,000	(2,000)
Purchases of stock by deferred compensation plan								42			(42)
Purchases of stock by deferred compensation plan, shares											(1,000)
Distribution of stock from deferred compensation plan								(268)			268
Distribution of stock from deferred compensation plan, shares											23,000
Balances at Mar. 31, 2013	1,068,181	106	97,782	(16,003)	11,808	(323)	(27,488)	4,213	1,128,659	(142,363)	(4,213)
Balance, Treasury Stock, shares at Mar. 31, 2013										(4,201,000)
Balance, Common Stock, shares at Mar. 31, 2013		72,960,000
Balance, Treasury stock held for deferred compensation, Shares at Mar. 31, 2013											(256,000)
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	68,181								68,181			68,181
Other Comprehensive Income (Loss), Net of Tax	4,636			4,636	4,525	31	80
Cash dividends paid	(10,754)								(10,754)
Purchases of treasury stock	(101,241)									(101,241)
Purchases of treasury stock, shares										(2,388,000)
Sales of treasury stock	6,862		(4,203)							11,065
Sales of treasury stock, shares										354,000
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	2,046		2,046
Stock-based compensation	6,330		6,330
Purchases of stock by deferred compensation plan								276			(276)
Purchases of stock by deferred compensation plan, shares											(6,000)
Distribution of stock from deferred compensation plan								(274)			274
Distribution of stock from deferred compensation plan, shares											23,000
Balances at Mar. 31, 2014	$ 1,129,798	$ 106	$ 108,157	$ 19,751	$ 30,267	$ 74	$ (10,590)	$ 4,009	$ 1,251,314	$ (249,530)	$ (4,009)	$ 1,129,798
Balance, Treasury Stock, shares at Mar. 31, 2014										(6,657,000)		(6,657,000)
Balance, Common Stock, shares at Mar. 31, 2014		72,960,000										72,960,000
Balance, Preferred Stock, shares at Mar. 31, 2014												0
Balance, Treasury stock held for deferred compensation, Shares at Mar. 31, 2014											(215,000)	(215,000)