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STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION (Schedule of Share-based Compensation) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Jun. 30, 2013 | Jun. 30, 2012
Share-based compensation: |  |
Share-based compensation | $ 3,356 | $ 4,287
Cost of revenue [Member] |  |
Share-based compensation: |  |
Share-based compensation | 528 | 571
Research and development [Member] |  |
Share-based compensation: |  |
Share-based compensation | 868 | 900
Selling and marketing [Member] |  |
Share-based compensation: |  |
Share-based compensation | 1,074 | 1,084
General and administrative [Member] |  |
Share-based compensation: |  |
Share-based compensation | $ 886 | $ 1,732

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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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Period Type: | duration

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- Details
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Period Type: | duration