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Financial Instruments (Fair Value Of Derivatives) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Sep. 30, 2011
Financial Instruments [Abstract]
Gross Asset Derivatives, Fair Value	$ 122,870	$ 90,253
Gross Liability Derivatives, Fair Value	$ 64,965	$ 23,842

Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

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- Definition

Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

+ References+ Details