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Restructuring (Details)
$ in Thousands
 3 Months Ended 12 Months Ended 16 Months Ended
Sep. 30, 2016
USD ($)
Facility
Dec. 31, 2017
USD ($)
Dec. 31, 2017
USD ($)
Summary of activity for liabilities [Roll Forward]      
Number of facilities | Facility 1    
Selling, General and Administrative Expenses [Member]      
Summary of activity for liabilities [Roll Forward]      
Abandonment of equipment charge $ 3,700    
EBOL Restructuring Plan [Member]      
Restructuring Cost and Reserve [Line Items]      
Incurred costs   $ 40 $ 9,726
Termination Benefits [Member]      
Summary of activity for liabilities [Roll Forward]      
Balance, beginning of period   4,357  
Expenses incurred   40  
Amount paid   (4,387)  
Balance, end of period   10 10
Termination Benefits [Member] | EBOL Restructuring Plan [Member]      
Restructuring Cost and Reserve [Line Items]      
Incurred costs   40 5,286
Abandonment of Equipment [Member] | EBOL Restructuring Plan [Member]      
Restructuring Cost and Reserve [Line Items]      
Incurred costs   0 3,749
Other Costs [Member] | EBOL Restructuring Plan [Member]      
Restructuring Cost and Reserve [Line Items]      
Incurred costs   $ 0 $ 691