Common Stock, Warrants, Options, and Stock Compensation (Details 1) (USD $) In Millions, except Share data	12 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Summary of the restricted stock awards (RSA) activity
Weighted average grant-date fair value per share of RSAs granted	$ 20.34	$ 14.64	$ 17.51
Total grant date fair value of RSAs vested	$ 13.5	$ 0.2	$ 4.8
Restricted Stock [Member]
Summary of the restricted stock awards (RSA) activity
Outstanding Shares at beginning of year	1,781,250
Weighted average grant date fair value outstanding at beginning of year	$ 13.50
Granted, Shares	868,500
Granted, Weighted average grant date fair value	$ 20.34
Released, Shares	(1,035,250)
Released, Weighted average grant date fair value	$ 13.08
Forfeited, Shares	(79,500)
Forfeited, Weighted average grant date fair value	$ 16.61
Outstanding Shares at end of year	1,535,000
Weighted average grant date fair value outstanding at end of year	$ 17.49

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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The weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect during the reporting period as a result of the occurrence of a terminating event specified in the contractual agreement of the plan.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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The total fair value of equity-based awards for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

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