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Unaudited Condensed Consolidated Financial Statements (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Assets held for sale   $ 14,117   $ 4,477
Proceeds from the sale of operation   4,900    
Loans to cost and equity method investees   $ 6,928 $ 6,595  
Cost of goods sold - product remediation        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Litigation related expenses reclassified $ 700   2,200  
SG&A        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Litigation related expenses reclassified $ 1,700   $ 2,500