Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	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, 2013	$ 106	$ 101,147	$ 15,115	$ 25,742	$ 43	$ (10,670)	$ 4,007	$ 1,193,887	$ (167,710)	$ (4,007)	$ 1,142,545
Balance, Common Stock, shares at Sep. 30, 2013	72,960,000
Balance, Treasury Stock, shares at Sep. 30, 2013									(4,883,000)
Balance, Treasury stock held for deferred compensation, Shares at Sep. 30, 2013										(232,000)
Net earnings								114,182			114,182
Other Comprehensive Income (Loss), Net of Tax			4,876	4,527	46	303					4,876
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		(4,949)							$ 14,042		9,093
Sales of treasury stock, shares									455,000
Common shares issued from treasury stock for benefit plans		2,837							$ 8,356		11,193
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	$ 106	110,237	19,991	30,269	89	(10,367)	3,878	1,292,048	$ (288,385)	$ (3,878)	1,133,997
Balance, Common Stock, shares at Jun. 30, 2014	72,960,000
Balance, Treasury Stock, shares at Jun. 30, 2014									(7,477,000)
Balance, Treasury stock held for deferred compensation, Shares at Jun. 30, 2014										(198,000)
Balances at Sep. 30, 2014	$ 106	112,491	(3,533)	10,819	105	(14,457)	3,915	1,338,468	$ (286,588)	$ (3,915)	$ 1,160,944
Balance, Preferred Stock, shares at Sep. 30, 2014											0
Balance, Common Stock, shares at Sep. 30, 2014	72,960,000										72,960,000
Balance, Treasury Stock, shares at Sep. 30, 2014									(7,397,000)		(7,397,000)
Balance, Treasury stock held for deferred compensation, Shares at Sep. 30, 2014										(198,000)	(198,000)
Net earnings								131,392			$ 131,392
Other Comprehensive Income (Loss), Net of Tax			(25,769)	(26,455)	46	640					(25,769)
Cash dividends paid								(18,285)			(18,285)
Purchases of treasury stock									$ (157,118)		(157,118)
Purchases of treasury stock, shares									(2,670,000)
Sales of treasury stock		(4,841)							$ 12,777		7,936
Sales of treasury stock, shares									428,000
Common shares issued from treasury stock for benefit plans		4,490							$ 8,084		12,574
Common shares issued from treasury stock for benefit plans, shares									259,000
Tax benefit attributable to exercise of stock options		4,511									4,511
Stock-based compensation		11,086									11,086
Purchases of stock by deferred compensation plan							876			$ (876)
Purchases of stock by deferred compensation plan, shares										(18,000)
Distribution of stock from deferred compensation plan							(477)			$ 477
Distribution of stock from deferred compensation plan, shares										43,000
Balances at Jun. 30, 2015	$ 106	$ 127,737	$ (29,302)	$ (15,636)	$ 151	$ (13,817)	$ 4,314	$ 1,451,575	$ (422,845)	$ (4,314)	$ 1,127,271
Balance, Preferred Stock, shares at Jun. 30, 2015											0
Balance, Common Stock, shares at Jun. 30, 2015	72,960,000										72,960,000
Balance, Treasury Stock, shares at Jun. 30, 2015									(9,380,000)		(9,380,000)
Balance, Treasury stock held for deferred compensation, Shares at Jun. 30, 2015										(173,000)	(173,000)