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CASH, CASH EQUIVALENTS AND SHORT AND LONG TERM INVESTMENTS - Long-term Investments, Xalted Networks, or Xalted (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Mar. 31, 2006 | Aug. 31, 2005 | May 31, 2005 | Sep. 30, 2012 | Dec. 31, 2011 | Sep. 30, 2009 | Dec. 31, 2015 | Dec. 31, 2014 | Jun. 30, 2011
Xalted Networks | Maximum |  |  |  |  |  |  |  |  |
CASH, CASH EQUIVALENTS AND SHORT AND LONG TERM INVESTMENTS |  |  |  |  |  |  |  |  |
Investment, ownership interest (as a percent) |  |  |  |  |  |  | 10.00% | 10.00% |
Xalted Networks |  |  |  |  |  |  |  |  |
CASH, CASH EQUIVALENTS AND SHORT AND LONG TERM INVESTMENTS |  |  |  |  |  |  |  |  |
Payments to acquire investments | $ 300 | $ 1,000 | $ 2,000 |  |  |  |  |  |
Other-than-temporary impairment charge |  |  |  | $ 800 | $ 500 | $ 1,700 | $ 20 | $ 300 |
Kranem | Xalted Networks |  |  |  |  |  |  |  |  |
CASH, CASH EQUIVALENTS AND SHORT AND LONG TERM INVESTMENTS |  |  |  |  |  |  |  |  |
Issued and outstanding stock ownership percentage |  |  |  |  |  |  |  |  | 35.00%

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- Definition This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the cost method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6872867&loc=d3e40691-111596 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The cash outflow associated with the purchase of all investments (debt, security, other) during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585 + Details
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- Definition Percentage of voting equity interests in the investee held by the entity. + References No definition available. + Details
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