Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income.	Treasury Stock	Total
Balance at Sep. 30, 2012	$ 10,760	$ 236,240	$ 3,505,295	$ 166,807	$ (84,104)	$ 3,834,998
Balance (in shares) at Sep. 30, 2012	107,599,000
Balance (in shares) at Sep. 30, 2012					1,901,000
Comprehensive Income:
Net income			736,639			736,639
Other comprehensive loss				(34,277)		(34,277)
Dividends declared ($2.75, $2.625, $1.30 per share for the years ending 2015, 2014 and 2013 respectively)			(139,271)			(139,271)
Exercise of stock options, net of tax withholding	$ 106	21,746			$ (8,535)	13,317
Exercise of stock options, net of tax withholding (in shares)	1,057,000				162,000
Tax benefit of stock-based awards		10,727				10,727
Stock issued for vested restricted stock, net of shares withheld for employee taxes	$ 8	(3,226)			$ 1,541	$ (1,677)
Stock issued for vested restricted stock, net of shares withheld for employee taxes (in shares)	83,000				(41,000)
Repurchase of common stock (in shares)						0
Stock-based compensation		23,271				$ 23,271
Balance at Sep. 30, 2013	$ 10,874	288,758	4,102,663	132,530	$ (91,098)	4,443,727
Balance (in shares) at Sep. 30, 2013	108,739,000
Balance (in shares) at Sep. 30, 2013					2,022,000
Comprehensive Income:
Net income			708,719			708,719
Other comprehensive loss				(49,404)		(49,404)
Dividends declared ($2.75, $2.625, $1.30 per share for the years ending 2015, 2014 and 2013 respectively)			(285,585)			(285,585)
Exercise of stock options, net of tax withholding	$ 161	41,911			$ (18,822)	23,250
Exercise of stock options, net of tax withholding (in shares)	1,613,000				216,000
Tax benefit of stock-based awards		26,616				26,616
Stock issued for vested restricted stock, net of shares withheld for employee taxes	$ 16	(16)			$ (3,049)	$ (3,049)
Stock issued for vested restricted stock, net of shares withheld for employee taxes (in shares)	157,000				38,000
Repurchase of common stock (in shares)						0
Stock-based compensation		26,703				$ 26,703
Balance at Sep. 30, 2014	$ 11,051	383,972	4,525,797	83,126	$ (112,969)	$ 4,890,977
Balance (in shares) at Sep. 30, 2014	110,509,000					110,508,605
Balance (in shares) at Sep. 30, 2014					2,276,000	2,276,321
Comprehensive Income:
Net income			422,225			$ 422,225
Other comprehensive loss				(84,503)		(84,503)
Dividends declared ($2.75, $2.625, $1.30 per share for the years ending 2015, 2014 and 2013 respectively)			(298,070)			(298,070)
Exercise of stock options, net of tax withholding	$ 26	7,223			$ (4,599)	2,650
Exercise of stock options, net of tax withholding (in shares)	255,000				64,000
Tax benefit of stock-based awards		3,772				3,772
Stock issued for vested restricted stock, net of shares withheld for employee taxes	$ 22	(21)			$ (5,141)	(5,140)
Stock issued for vested restricted stock, net of shares withheld for employee taxes (in shares)	223,000				70,000
Repurchase of common stock					$ (59,654)	$ (59,654)
Repurchase of common stock (in shares)					810,000	810,097
Stock-based compensation		25,195				$ 25,195
Balance at Sep. 30, 2015	$ 11,099	$ 420,141	$ 4,649,952	$ (1,377)	$ (182,363)	$ 4,897,452
Balance (in shares) at Sep. 30, 2015	110,987,000					110,987,546
Balance (in shares) at Sep. 30, 2015					3,220,000	3,219,631