Income Taxes - Schedule of Income before income tax, Domestic and Foreign (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax [Line Items]
Loss from continuing operations before income taxes, equity in affiliates	$ (80,407)	$ 87,078	$ (49,716)
Domestic Tax Authority
Income Tax [Line Items]
Loss from continuing operations before income taxes, equity in affiliates	(68,698)	48,053	(16,661)
Foreign Tax Authority
Income Tax [Line Items]
Loss from continuing operations before income taxes, equity in affiliates	$ (11,709)	$ 39,025	$ (33,055)