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FINANCIAL INSTRUMENTS - Realized and Unrealized Gains and Losses (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Adjustments to Carrying Value of Non-Marketable Equity Securities |  |  |  |
Upward adjustments (gross unrealized gains) | $ 53 | $ 0 | $ 53 | $ 128,786
Downward adjustments including impairment (gross unrealized losses) | (543) | 0 | (1,193) | (2,588)
Total | (490) | 0 | (1,140) | 126,198
Adjustments to Carrying Value of Non-Marketable Equity Securities |  |  |  |
Realized (losses) gains, net, for equity securities sold | (8) | 702 | 2,136 | 27,874
Unrealized (losses) gains, net, on equity securities held | (5,066) | (115) | 24,181 | 126,444
Total (losses) gains recognized, net, in other income, net | $ (5,074) | $ 587 | $ 26,317 | $ 154,318

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- Definition Amount of unrealized and realized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=116654751&loc=SL75117546-209714 + Details
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- Definition Amount of realized gain (loss) from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=116654751&loc=SL75117546-209714 + Details
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