Prior Periods' Financial Statement Revision Prior Periods' Financial Statement Revision - Schedule of Correction of Misstatements in Consolidated Statements of Changes in Stockholders' Equity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Additional paid-in capital	$ 501,615	$ 508,655
Net income (loss)	(46,741)	(262,987)	$ 162,237
Accumulated deficit	(105,283)	(58,491)
Foreign currency translation gain	(3,845)	(13,609)	22,134
Accumulated other comprehensive loss	(44,554)	(31,314)
Total stockholders' equity	$ 353,277	419,271	485,329	$ 309,391
Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Additional paid-in capital		511,545
Net income (loss)		(264,467)	163,052
Accumulated deficit		(62,046)	211,080
Foreign currency translation gain		(13,880)	22,094
Accumulated other comprehensive loss		(31,625)	(17,745)
Total stockholders' equity		418,295	486,104
Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Additional paid-in capital		(2,890)
Net income (loss)		1,480	(815)
Accumulated deficit		3,555	(815)
Foreign currency translation gain		271	40
Accumulated other comprehensive loss		311	40
Total stockholders' equity		976	(775)
Continuing Operations As Revised
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Additional paid-in capital		508,655
Net income (loss)		(262,987)	162,237
Accumulated deficit		(58,491)	210,265
Foreign currency translation gain		(13,609)	22,134
Accumulated other comprehensive loss		(31,314)	(17,705)
Total stockholders' equity		$ 419,271	$ 485,329