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Stock Based Compensation (Details 4)	3 Months Ended
	Jun. 30, 2012
Changes in Stock appreciation rights
Number of options, Beginning Balance	872,032
Number of options, Granted
Number of SARs, Exercised
Number of options, Ending Balance	854,985
Stock Appreciation Rights (SARs) [Member]
Changes in Stock appreciation rights
Number of options, Beginning Balance	115,187
Number of options, Granted
Number of SARs, Exercised
Number of SARs, Forfeited and Expired
Number of options, Ending Balance	115,187
SARs Exercisable, Ending Balance	115,187

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901



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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(c), d(2)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(3)-(4)

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Gross number of share options (or share units) granted during the period.

+ References

No definition available.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

+ References

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-Publisher FASB

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-Number 123R

-Paragraph A240

-Subparagraph b(1)(b)

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Number of share options (or share units) exercised during the current period.

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-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

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-Name Regulation S-X (SX)

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-Section 04

-Article 3



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