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Shareholders' Equity (Detail Textuals 1) (USD $) | 0 Months Ended | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Aug. 01, 2011 | Nov. 01, 2010 | Nov. 08, 2006 | Oct. 31, 2008 | Mar. 31, 2013 | Mar. 31, 2012
Stockholders Equity Note [Line Items] |  |  |  |  |  |
Outstanding common stock, value |  |  |  |  | $ 20,000 | $ 20,000
Common stock, par value (in dollars per share) |  |  |  |  | $ 0.001 | $ 0.001
Share Repurchase Plan |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |
Amount approved of share repurchase plan | 20,000,000 | 20,000,000 | 20,000,000 | 20,000,000 |  |
Number of shares repurchased |  |  |  |  | 397,000 | 2,100,000
Outstanding common stock, value |  |  |  |  | 3,900,000 | 23,700,000
Common stock, par value (in dollars per share) |  |  |  |  | $ 9.74 | $ 11.36
Value of remaining shares |  |  |  |  | $ 10,200,000 |

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- Definition Face amount or stated value of common stock per share; generally not indicative of the fair market value per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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- Definition Value of all classes of common stock held by shareholders. May be all or portion of the number of common shares authorized. These shares exclude common shares repurchased by the entity and held as treasury shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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