Capital Expenditures Paid and Committed

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Estimated Capital Expenditures Subsequent Fiscal Year

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Estimated Capital Expenditures Two Years Subsequent

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within one year of the balance sheet date relating to leases defined as operating.

+ References

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the fifth year of the balance sheet date relating to leases defined as operating.

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For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the fourth year of the balance sheet date relating to leases defined as operating.

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For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the third year of the balance sheet date relating to leases defined as operating.

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For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the second year of the balance sheet date relating to leases defined as operating.

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For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due after the fifth year from the balance sheet date on leases defined as operating.

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The cash outflow for acquisition of or capital improvements on other tangible or intangible assets not otherwise defined in the taxonomy.

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COMMITMENTS AND CONTINGENT LIABILITIES, CAPITAL EXPENDITURES (Details) (USD $)	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Long-term Purchase Commitment [Line Items]
Estimated Capital Expenditures Subsequent Fiscal Year	$ 121,200,000
Estimated Capital Expenditures Two Years Subsequent To Fiscal Year	70,000,000
Payments to Acquire Other Productive Assets	71,989,000	2,641,000	0
Solar Related Expenditures [Member]
Long-term Purchase Commitment [Line Items]
Estimated Capital Expenditures Subsequent Fiscal Year	88,000,000
Capital Expenditures Paid and Committed	75,500,000
AIP II Construction Costs [Member]
Long-term Purchase Commitment [Line Items]
Estimated Capital Expenditures Subsequent Fiscal Year	49,900,000
Estimated Capital Expenditures Two Years Subsequent To Fiscal Year	3,100,000
Maximum [Member]
Long-term Purchase Commitment [Line Items]
Operating Leases, Future Minimum Payments Due, Current	2,300,000
Operating Leases, Future Minimum Payments, Due in Two Years	2,300,000
Operating Leases, Future Minimum Payments, Due in Three Years	2,300,000
Operating Leases, Future Minimum Payments, Due in Four Years	2,300,000
Operating Leases, Future Minimum Payments, Due in Five Years	2,300,000
Operating Leases, Future Minimum Payments, Due Thereafter	$ 5,700,000