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MARKETABLE SECURITIES (Tables) | 9 Months Ended
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Sep. 30, 2013
Cash And Cash Equivalents [Abstract] |
Summary of Maturity of Available for Sale Marketable Securities | The following is a summary of available-for-sale marketable securities at September 30, 2013 and December 31, 2012:
|  | As at September 30, 2013 (Unaudited) |
|  | Amortized cost |  |  | Gross unrealized gains |  |  | Gross unrealized losses |  |  | Fair value |
Available-for-sale securities - matures within one year: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds |  | $ | 4,110 |  |  | $ | 12 |  |  | $ | (6 | ) |  | $ | 4,116 |
|  |  | 4,110 |  |  |  | 12 |  |  |  | (6 | ) |  |  | 4,116 |
Available-for-sale securities - matures after one year through three years: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds |  |  | 76,641 |  |  |  | 94 |  |  |  | (348 | ) |  |  | 76,387 |
|  |  | 76,641 |  |  |  | 94 |  |  |  | (348 | ) |  |  | 76,387 |
Total |  | $ | 80,751 |  |  | $ | 106 |  |  | $ | (354 | ) |  | $ | 80,503 |
|  | As at December 31, 2012 (Audited) |
|  | Amortized cost |  |  | Gross unrealized gains |  |  | Gross unrealized losses |  |  | Fair value |
Available-for-sale securities - matures within one year: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds |  | $ | 10,964 |  |  | $ | 73 |  |  | $ | (4 | ) |  | $ | 11,033 |
|  |  | 10,964 |  |  |  | 73 |  |  |  | (4 | ) |  |  | 11,033 |
Available-for-sale securities - matures after one year through three years: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Certificates of deposits |  |  | 1,960 |  |  |  | — |  |  |  | (1 | ) |  |  | 1,959 |
Foreign government bond |  |  | 573 |  |  |  | 2 |  |  |  | — |  |  |  | 575 |
Corporate bonds |  |  | 55,622 |  |  |  | 391 |  |  |  | (237 | ) |  |  | 55,776 |
|  |  | 58,155 |  |  |  | 393 |  |  |  | (238 | ) |  |  | 58,310 |
Total |  | $ | 69,119 |  |  | $ | 466 |  |  | $ | (242 | ) |  | $ | 69,343 |
Summary of Gross Unrealized Losses and Fair Values on Investments | The following table presents gross unrealized losses and fair values for those investments that were in an unrealized loss position as of September 30, 2013 and December 31, 2012, and the length of time that those investments have been in a continuous loss position:
|  | Less than 12 months |  |  | 12 months or greater |
|  | Fair Value |  |  | Gross unrealized loss |  |  | Fair Value |  |  | Gross unrealized loss |
As of September 30, 2013 |  | $ | 52,475 |  |  | $ | (353 | ) |  | $ | 369 |  |  | $ | (1 | )
As of December 31, 2012 |  | $ | 28,711 |  |  | $ | (241 | ) |  | $ | 489 |  |  | $ | (1 | )
Summary of Gross Realized Gain and Loss from Sale of Available-for-Sale Marketable Securities | The following table presents gross realized gain and gross realized loss from sale of available-for-sale marketable securities:
|  | Nine months ended September 30, |  |  | Three months ended September 30, |
|  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
|  | (unaudited) |  |  | (unaudited) |  |  | (unaudited) |  |  | (unaudited) |
Gross realized gain from sale of available-for-sale marketable securities |  | $ | 322 |  |  | $ | 208 |  |  | $ | 66 |  |  | $ | 45 |
Gross realized loss from sale of available-for-sale marketable securities |  | $ | (21 | ) |  | $ | (117 | ) |  | $ | (4 | ) |  | $ | (81 | )

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- Definition Tabular disclosure of the proceeds from sales of available-for-sale securities and the gross realized gains and gross realized losses that have been included in earnings as a result of those sales. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 + Details
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