Condensed Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data	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, Treasury Stock, shares at Sep. 30, 2013									(4,883,000)
Balance, Common Stock, shares at Sep. 30, 2013	72,960,000
Balance, Treasury stock held for deferred compensation, Shares at Sep. 30, 2013										(232,000)
Net earnings								68,181			68,181
Other Comprehensive Income (Loss), Net of Tax			4,636	4,525	31	80					4,636
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		(4,203)							11,065		6,862
Sales of treasury stock, shares									354,000
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		2,046									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	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)
Balance, Common Stock, shares at Mar. 31, 2014	72,960,000
Balance, Treasury stock held for deferred compensation, Shares at Mar. 31, 2014										(215,000)
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, Treasury Stock, shares at Sep. 30, 2014									(7,397,000)		(7,397,000)
Balance, Common Stock, shares at Sep. 30, 2014	72,960,000										72,960,000
Balance, Preferred Stock, shares at Sep. 30, 2014											0
Balance, Treasury stock held for deferred compensation, Shares at Sep. 30, 2014										(198,000)	(198,000)
Net earnings								87,639			87,639
Other Comprehensive Income (Loss), Net of Tax			(32,735)	(33,685)	31	919					(32,735)
Cash dividends paid								(11,752)			(11,752)
Purchases of treasury stock									(32,118)		(32,118)
Purchases of treasury stock, shares									(622,000)
Sales of treasury stock		(846)							3,306		2,460
Sales of treasury stock, shares									107,000
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		687									687
Stock-based compensation		7,890									7,890
Purchases of stock by deferred compensation plan							859			(859)
Purchases of stock by deferred compensation plan, shares										(17,000)
Distribution of stock from deferred compensation plan							(289)			289
Distribution of stock from deferred compensation plan, shares										24,000
Balances at Mar. 31, 2015	$ 106	$ 124,712	$ (36,268)	$ (22,866)	$ 136	$ (13,538)	$ 4,485	$ 1,414,355	$ (307,316)	$ (4,485)	$ 1,195,589
Balance, Treasury Stock, shares at Mar. 31, 2015									(7,653,000)		(7,653,000)
Balance, Common Stock, shares at Mar. 31, 2015	72,960,000										72,960,000
Balance, Preferred Stock, shares at Mar. 31, 2015											0
Balance, Treasury stock held for deferred compensation, Shares at Mar. 31, 2015										(191,000)	(191,000)