Stock Based Compensation (Details 1) (USD $)	9 Months Ended
Jun. 30, 2012
Stock option activity
Outstanding Stock Options, Beginning balance	97,550
Outstanding Weighted Average Exercise Price, Beginning balance	$ 18.44
Granted Stock Options
Granted Weighted Average Exercise Price
Exercised Stock Options	(97,550)
Exercised Weighted Average Exercise Price	$ 18.44
Forfeited Stock Options
Forfeited Weighted Average Exercise Price
Outstanding Stock Options, Ending balance
Outstanding Weighted Average Exercise Price, Ending balance
Outstanding Remaining Weighted Average Contractual Term (Years)
Outstanding Aggregate Intrinsic Value
Exercisable Stock Options
Exercisable Weighted Average Exercise Price
Exercisable Remaining Weighted Average Contractual Term (Years)
Exercisable Aggregate Intrinsic Value

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Weighted average price of options that were either forfeited or expired.

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- Definition

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Gross number of share options (or share units) granted during the period.

+ References

No definition available.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of options outstanding.

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- Definition

The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

+ References

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- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average price at which grantees can acquire the shares reserved for issuance on stock options awarded.

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Number of share options (or share units) exercised during the current period.

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