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Condensed Consolidated Statements Of Retained Earnings (USD $) In Thousands	3 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Condensed Consolidated Statements Of Retained Earnings [Abstract]
Retained earnings, beginning of period	$ 316,894	$ 193,691
Net income	34,986	21,671
Retained earnings, end of period	$ 351,880	$ 215,362

X

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 225

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

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-Paragraph 38

-Subparagraph a

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.



Reference 9: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Glossary Other Comprehensive Income

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-Publisher AICPA

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.



Reference 12: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Publisher SEC

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Reference 15: http://www.xbrl.org/2003/role/presentationRef

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