Fair Value of Financial Assets and Liabilities that were Measured at Fair Value on a Recurring Basis (Detail) (USD $) In Thousands	Jun. 30, 2011	Jun. 30, 2010
Assets:
Available for sale securities		$ 3,542
Derivatives	638	1,624
Liabilities:
Derivatives	39,561	2,334
Significant Other Observable Inputs (Level 2)
Assets:
Derivatives	638	1,624
Liabilities:
Derivatives	39,561	2,334
Significant Unobservable Inputs (Level 3)
Assets:
Available for sale securities		$ 3,542

Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.

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Derivative instrument obligations meeting the definition of a liability which the Company is a party to as of the balance sheet date.

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- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents investment securities as of the balance sheet date which may include marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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