Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Document Period End Date			Sep. 30, 2020
Net income (loss)	$ (79,365)		$ (471,751)	$ (85,532)
Other Comprehensive Income (Loss):
Foreign currency translation adjustments	13,204	$ (33,159)	(46,492)	(26,710)
Total other comprehensive income (loss)	13,204	(33,159)	(46,492)	(26,710)
Comprehensive income (loss)	(66,161)	(58,682)	$ (518,243)	$ (112,242)
Currency Translation Adjustments [Member]
Other Comprehensive Income (Loss):
Total other comprehensive income (loss)	$ 13,204	$ (33,159)