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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		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Supplemental Consolidated Balance Sheet & Statement of Operations Information [Abstract]
Interest income	$ 1,327	$ 1,430	$ 2,482	$ 3,986
Interest expense	(5,473)	(8,009)	(10,589)	(14,967)
Impairment and other changes in fair value of investments	4,245	0	4,245	(8,089)
Loss on extinguishment of debt	(5,090)	0	(5,090)	0
Foreign currency gains (losses), net and other	2,064	4,884	24,148	(1,612)
Other income (expense), net	$ (2,927)	$ (1,695)	15,196	(20,682)
Foreign currency translation adjustments reclassified into earnings			$ 32,284	$ 0

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Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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