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LONG-TERM DEBT - Senior Unsecured Notes (Details) (USD $)	Jun. 30, 2012	Mar. 06, 2012	Sep. 30, 2011	Feb. 28, 2005
Debt Instrument [Line Items]
Debt outstanding	$ 1,652,996,000		$ 1,629,775,000
Accrued interest	46,614,000		28,580,000
Senior Unsecured Notes [Member] \| 2005 6 1/8% Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Loan face amount				250,000,000
Note stated interest rate	6.125%			6.125%
Principal amount tendered and exchanged		234,200,000
Debt outstanding	15,775,000		250,000,000
Accrued interest	$ 322,000		$ 1,900,000

Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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