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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net loss	$ (90,419)	$ (157,957)	$ (22,862)
Other comprehensive income (loss):
Foreign currency translation adjustment	10,145	(4,447)	7,798
Unrealized gain (loss) on marketable securities, net of tax	54	(747)	613
Total comprehensive loss	$ (80,220)	$ (163,151)	$ (14,451)

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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