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Net Income Per Share (Tables) | 12 Months Ended
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Mar. 31, 2015
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, |
|  | 2015 |  |  | 2014 |  |  | 2013 |
Net income (numerator): |  |  |  |  |  |  |  |  |
Net income |  | $ | 17,453 |  |  | $ | 17,972 |  |  | $ | 17,165 |
Shares (denominator) |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of common shares outstanding used in basic computation |  |  | 20,015 |  |  |  | 19,901 |  |  |  | 19,926 |
Common shares issuable upon the vesting of restricted stock |  |  | 111 |  |  |  | 132 |  |  |  | 113 |
Common shares issuable upon conversion of preferred shares |  |  | 10 |  |  |  | 10 |  |  |  | 10 |
Shares used in diluted computation |  |  | 20,136 |  |  |  | 20,043 |  |  |  | 20,049 |
Net income per common share: |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.87 |  |  | $ | 0.90 |  |  | $ | 0.86 |
Diluted |  | $ | 0.87 |  |  | $ | 0.90 |  |  | $ | 0.86 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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