Capitalization And Short-Term Borrowings (Schedule Of Share-Based Compensation For Stock Options And Share Awards) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2014		Sep. 30, 2013	Sep. 30, 2012
Schedule of Capitalization [Line Items]
Number of Shares Outstanding, Beginning of Year	803,500
Number of Shares Granted	0
Number of Shares Exercised	(321,500)
Number of Shares Forfeited	0
Number of Shares Outstanding, End of Year	482,000
Number of Option shares exercisable	482,000
Number of Shares Subject to Option, Option shares available for future grant	712,232	[1]
Weighted Average Exercise Price, Outstanding Beginning of Year	$ 34.71
Weighted Average Exercise Price, Granted	$ 0.00
Weighted Average Exercise Price, Exercised	$ 31.71
Weighted Average Exercise Price, Forfeited	$ 0.00
Weighted Average Exercise Price, Outstanding End of Year	$ 36.71
Weighted Average Exercise Price, Option shares exercisable	$ 36.71
Weighted Average Remaining Contractual Life, Outstanding	1 year 9 months 20 days
Weighted Average Remaining Contractual Life, Option shares exercisable	1 year 9 months 20 days
Aggregate Intrinsic Value Outstanding	$ 16,039
Aggregate Intrinsic Value, Option Shares exercisable	16,039
Performance Shares [Member]
Schedule of Capitalization [Line Items]
Number of Shares Outstanding, Beginning of Year	0
Number of Shares Granted	116,090		0	0
Number of Awards Vested	0
Number of Shares Forfeited	(17,624)
Number of Shares Outstanding, End of Year	98,466		0
Weighted Average Fair Value per Award, Beginning of Year	$ 0.00
Weighted Average Fair Value per Award Granted	$ 67.16
Weighted Average Fair Value per Award Vested	$ 0.00
Weighted Average Fair Value per Award Forfeited	$ 67.16
Weighted Average Fair Value per Award, End of Year	$ 67.16		$ 0.00
Stock Appreciation Rights (SARs) [Member]
Schedule of Capitalization [Line Items]
Number of Shares Outstanding, Beginning of Year	2,002,704
Number of Shares Granted	0		412,970	166,000
Number of Shares Exercised	(209,222)
Number of Shares Forfeited	0
Number of Shares Cancelled	0
Number of Shares Outstanding, End of Year	1,793,482		2,002,704
Number of SARs exercisable	1,434,023
Weighted Average Exercise Price, Outstanding Beginning of Year	$ 48.11		$ 46.73
Weighted Average Exercise Price, Granted	$ 0.00
Weighted Average Exercise Price, Exercised	$ 34.90
Weighted Average Exercise Price, Forfeited	$ 0.00
Weighted Average Exercise Price, Cancelled	$ 0.00
Weighted Average Exercise Price, Outstanding End of Year	$ 48.11		$ 46.73
Weighted Average Exercise Price, SARs exercisable	$ 46.65
Weighted Average Remaining Contractual Life, Outstanding	5 years 11 months 4 days
Weighted Average Remaining Contractual Life, SARs exercisable	5 years 5 months 13 days
Aggregate Intrinsic Value Outstanding	39,246
Aggregate Intrinsic Value, SARs exercisable	$ 33,466
Weighted Average Fair Value per Award Granted			$ 10.66	$ 11.20

[1] Includes shares available for SARs, restricted stock and performance share grants.