Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Narratives (Details)

v3.8.0.1
Summary of Significant Accounting Policies - Narratives (Details) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Summary of Significant Accounting Policies Table      
Foreign exchange expense $ (25,786,000) $ 3,558,000 $ 0
Restricted cash 1,048,000 14,335,000  
Interest costs capitalized 5,806,000 5,687,000 0
Research and development cost $ 13,859,000 7,266,000 $ 0
Building and building improvements | Minimum      
Summary of Significant Accounting Policies Table      
Fixed asset useful life 15 years    
Building and building improvements | Maximum      
Summary of Significant Accounting Policies Table      
Fixed asset useful life 33 years    
Machinery and equipment | Minimum      
Summary of Significant Accounting Policies Table      
Fixed asset useful life 3 years    
Machinery and equipment | Maximum      
Summary of Significant Accounting Policies Table      
Fixed asset useful life 10 years    
New Markets Tax Credit Financing      
Summary of Significant Accounting Policies Table      
Restricted cash $ 348,000 $ 13,780,000