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SUPPLEMENTAL CONDENSED CONSOLIDATED BALANCE SHEETS AND STATEMENTS OF OPERATIONS INFORMATION - Schedule of Other Income (Expense) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Supplemental Consolidated Balance Sheet & Statement of Operations Information [Abstract] |  |
Interest income | $ 1,155 | $ 2,556
Interest expense | (5,116) | (6,958)
Foreign currency gains (losses), net | 22,084 | (6,496)
Impairment and other changes in fair value of investments | 0 | (8,089)
Other income (expense), net | 18,123 | (18,987)
Foreign currency translation adjustments reclassified into earnings | $ (32,228) | $ 0

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