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Commitments and Contingencies (Details) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended		6 Months Ended
	Apr. 30, 2012	Sep. 30, 2010	Jun. 30, 2012	Mar. 31, 2012
Commitments and Contingencies
Number of companies which will equally share the gross profits over and above initial amount of gross profits retained by the reporting entity			2
Settled litigation
Commitments and Contingencies
Contractual payment sought (in shares)		200,000
Cash award	$ 1.4
Value of shares retired, which were sought as damages				0.8
Amount recorded as expense			$ 0.6

X

- Definition

Represents the approximate number of shares of the entity which the plaintiff seeks as award in the legal matter.

+ References

No definition available.

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X

- Definition

Represents the value of retired shares which were previously sought as damages.

+ References

No definition available.

+ Details

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X

- Definition

Represents the number of companies which will equally share the gross profits in excess of the initial amount of gross profits retained by the reporting entity.

+ References

No definition available.

+ Details

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X

- Definition

Amount of damages awarded to the plaintiff in the legal matter.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14326-108349



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14435-108349



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 9

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14557-108349

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- Definition

The amount of loss pertaining to the specified contingency that was charged against earnings in the period, including the effects of revisions in previously reported estimates.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14326-108349



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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 5

-Paragraph 9

-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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