Property, Plant and Equipment (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 4,065,229	$ 3,759,973
Depreciation	173,100	126,300	$ 87,900
Capitalized interest costs	12,600	18,400	$ 17,000
Use Rights [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 120,200	$ 106,200
Useful life property, plant and equipment (in years)	19 years