Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 10,238	$ (16,494)	$ (83,196)
Other comprehensive income (loss):
Foreign currency gain (loss), net	12,202	(4,683)	(32,561)
Total comprehensive income (loss)	$ 22,440	$ (21,177)	$ (115,757)