Equity Incentive Plan (Restricted Stock Activity) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2012 Restricted Stock [Member]	Sep. 30, 2012 Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Shares, Beginning Balance of outstanding restricted stock			90,000	5,492,000
Shares, Granted			59,000	2,786,000
Shares, Vested			(77,000)	(2,742,000)
Shares, Forfeited or not earned				(402,000)
Shares, Ending Balance of outstanding restricted stock			72,000	5,134,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Weighted Average Grant Date Fair Value, Beginning Balance of outstanding restricted stock			$ 21.30	$ 17.75
Weighted Average Grant Date Fair Value, Granted	$ 21.91	$ 16.07	$ 25.14	$ 20.06
Weighted Average Grant Date Fair Value, Vested			$ 21.23	$ 15.71
Weighted Average Grant Date Fair Value, Forfeited or not earned				$ 19.00
Weighted Average Grant Date Fair Value, Ending Balance of outstanding restricted stock			$ 24.49	$ 19.99
Intrinsic value [Abstract]
Aggregate Intrinsic Value, Ending Balance of outstanding restricted stock			$ 1,570	$ 112,165