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Net Income Per Share (Tables) | 12 Months Ended
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Mar. 31, 2013
Earnings Per Share [Abstract] |
Schedule of reconciliation of the numerators and denominators of the basic and diluted net income per share computations |
|  | Year Ended March 31, |
|  | 2013 |  |  | 2012 |  |  | 2011
Net income (numerator): |  |  |  |  |  |  |  |  |
Net income |  | $ | 17,165 |  |  | $ | 16,659 |  |  | $ | 20,871 |
Shares (denominator) |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of common shares outstanding used in basic computation |  |  | 19,926 |  |  |  | 20,613 |  |  |  | 22,514 |
Common shares issuable upon exercise of stock options and vesting of restricted stock |  |  | 113 |  |  |  | 85 |  |  |  | 119 |
Common shares issuable upon conversion of preferred shares |  |  | 10 |  |  |  | 10 |  |  |  | 10 |
Shares used in diluted computation |  |  | 20,049 |  |  |  | 20,708 |  |  |  | 22,643 |
Net income per common share: |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.86 |  |  | $ | 0.81 |  |  | $ | 0.93 |
Diluted |  | $ | 0.86 |  |  | $ | 0.80 |  |  | $ | 0.92 |

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- Definition Tabular disclosure of the numerators and the denominators of the basic and diluted per-share (or per-unit) computations for income from continuing operations, including the effect that has been given to preferred dividends. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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