Capitalization And Short-Term Borrowings (Schedule Of Transactions Involving Option Shares) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2012		Sep. 30, 2011	Sep. 30, 2010
Schedule of Capitalization [Line Items]
Number of Shares Subject to Option, Outstanding Options at September 30, 2011	1,758,961
Number of Shares Subject to Option, Granted in 2012	0
Number of Shares Subject to Option, Exercised in 2012	(476,243)
Number of Shares Subject to Option, Forfeited in 2012	0
Number of Shares Subject to Option, Outstanding Options at September 30, 2012	1,282,718
Number of Shares Subject to Option, Option shares exercisable at September 30, 2012	1,282,718
Weighted Average Exercise Price, Outstanding at September 30, 2011	$ 31.38
Weighted Average Exercise Price, Granted in 2012	$ 0.00
Weighted Average Exercise Price, Exercised in 2012	$ 25.28
Weighted Average Exercise Price, Forfeited in 2012	$ 0.00
Weighted Average Exercise Price, Outstanding at September 30, 2012	$ 33.64
Weighted Average Exercise Price, Option shares exercisable at September 30, 2012	$ 33.64
Weighted Average Remaining Contractual Life, Outstanding at September 30, 2012	2 years 7 months 24 days
Weighted Average Remaining Contractual Life, Option shares exercisable at September 30, 2012	2 years 7 months 24 days
Aggregate Intrinsic Value Outstanding at September 30, 2012	$ 26,166
Aggregate Intrinsic Value, Option Shares exercisable at September 30, 2012	26,166
Number of Shares Subject to Option, Option shares available for future grant at September 30, 2012	2,097,214	[1]
Non Performance Based SARs [Member]
Schedule of Capitalization [Line Items]
Number of Shares Subject to Option, Outstanding Options at September 30, 2011	245,000
Number of Shares Subject to Option, Granted in 2012	166,000		195,000
Number of Shares Subject to Option, Exercised in 2012	0
Number of Shares Subject to Option, Forfeited in 2012	0
Number of Shares Subject to Option, Outstanding Options at September 30, 2012	411,000		245,000
Number of Shares Subject to Option, Option shares exercisable at September 30, 2012	109,990
Weighted Average Exercise Price, Outstanding at September 30, 2011	$ 57.30		$ 58.79
Weighted Average Exercise Price, Granted in 2012	$ 55.09
Weighted Average Exercise Price, Exercised in 2012	$ 0.00
Weighted Average Exercise Price, Forfeited in 2012	$ 0.00
Weighted Average Exercise Price, Outstanding at September 30, 2012	$ 57.30		$ 58.79
Weighted Average Exercise Price, Option shares exercisable at September 30, 2012	$ 53.56
Weighted Average Remaining Contractual Life, Outstanding at September 30, 2012	8 years 2 months 12 days
Weighted Average Remaining Contractual Life, Option shares exercisable at September 30, 2012	6 years 6 months 4 days
Aggregate Intrinsic Value Outstanding at September 30, 2012	(1,339)
Aggregate Intrinsic Value, Option Shares exercisable at September 30, 2012	53
Performance Based SARs [Member]
Schedule of Capitalization [Line Items]
Number of Shares Subject to Option, Outstanding Options at September 30, 2011	1,225,153
Number of Shares Subject to Option, Granted in 2012	0			520,500
Number of Shares Subject to Option, Exercised in 2012	(2,000)
Number of Shares Subject to Option, Forfeited in 2012	0
Number of Shares Subject to Option, Cancelled in 2012	(6,000)	[2]
Number of Shares Subject to Option, Outstanding Options at September 30, 2012	1,217,153		1,225,153
Number of Shares Subject to Option, Option shares exercisable at September 30, 2012	1,039,309
Weighted Average Exercise Price, Outstanding at September 30, 2011	$ 40.78		$ 40.85
Weighted Average Exercise Price, Granted in 2012	$ 0.00
Weighted Average Exercise Price, Exercised in 2012	$ 29.88
Weighted Average Exercise Price, Forfeited in 2012	$ 0.00
Weighted Average Exercise Price, Cancelled in 2012	$ 58.99	[2]
Weighted Average Exercise Price, Outstanding at September 30, 2012	$ 40.78		$ 40.85
Weighted Average Exercise Price, Option shares exercisable at September 30, 2012	$ 38.80
Weighted Average Remaining Contractual Life, Outstanding at September 30, 2012	6 years 8 months 5 days
Weighted Average Remaining Contractual Life, Option shares exercisable at September 30, 2012	6 years 6 months 22 days
Aggregate Intrinsic Value Outstanding at September 30, 2012	16,140
Aggregate Intrinsic Value, Option Shares exercisable at September 30, 2012	$ 15,837

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

[2] Shares were canceled during 2012 due to performance condition not being met