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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Mar. 31, 2013
Accounting Policies [Abstract] |
Schedule of comprehensive income |
|  | March 31, |
|  | 2013 |  |  | 2012 |  |  | 2011 |
Net income |  | $ | 17,165 |  |  | $ | 16,659 |  |  | $ | 20,871 |
Net change in unrealized gain (loss) on short term investments |  |  | (46 | ) |  |  | 75 |  |  |  | (31 | )
Net change in unrealized gain (loss) and redemptions on long term investments |  |  | - |  |  |  | 110 |  |  |  | (2 | )
Comprehensive income |  | $ | 17,119 |  |  | $ | 16,844 |  |  | $ | 20,838 |

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- Definition Tabular disclosure of components of comprehensive income (loss) including, but not limited to: (a) foreign currency translation adjustments; (b) gains (losses) on foreign currency transactions that are designated as, and are effective as, economic hedges of a net investment in a foreign entity; (c) gains (losses) on intercompany foreign currency transactions that are of a long-term-investment nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements; (d) change in the market value of a futures contract that qualifies as a hedge of an asset reported at fair value; (e) unrealized holding gains (losses) on available-for-sale securities and that resulting from transfers of debt securities from the held-to-maturity category to the available-for-sale category; (f) a net loss recognized as an additional pension liability not yet recognized as net periodic pension cost; and (g) the net gain (loss) and net prior service cost or credit for pension plans and other postretirement benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e526-108580 + Details
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