Debt (Schedule of the Allocation of Transaction Costs) (Details) (USD $) In Thousands	9 Months Ended
Jun. 30, 2011
Debt
Principal amount	$ 287,500
Less: note discount	(45,812)
Less: note issuance costs	(5,134)
Senior convertible notes, net	236,554
Equity components	57,996
Less: issuance costs	(1,669)
Additional paid-in capital	56,327
Note hedge costs	60,145
Warrants proceeds	(26,076)
Net cost	$ 34,069

Note hedge, net costs

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The carrying amount (net of accumulated amortization) as of the balance sheet date of capitalized costs associated with the equity component of the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the debt instruments to which such costs pertain.

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- Definition

Purchase of note hedges

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Adjustment to additional paid in capital resulting from the recognition of convertible debt instruments as two separate components - a debt component and an equity component. This bifurcation may result in a basis difference associated with the liability component that represents a temporary difference for purposes of applying accounting for income taxes. The initial recognition of deferred taxes for the tax effect of that temporary difference is as an adjustment to additional paid in capital.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of a written promise to pay a note, initially due after one year or beyond the operating cycle if longer, which can be exchanged for a specified amount of one or more securities (typically common stock), at the option of the issuer or the holder.

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The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.

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The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount.

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The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

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The cash inflow associated with the amount received from holders exercising their stock warrants.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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