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Discontinued Operations (Narrative) (Details) - USD ($)
$ in Thousands
9 Months Ended
Jan. 22, 2018
Sep. 30, 2019
Sep. 30, 2018
Discontinued Operations [Abstract]      
Discontinued Operation, Name Denville    
Sale price of of assets Denville $ 20,000    
Earn out provision of discontinued operations 3,000    
Proceeds From Divestiture Of Business   $ 1,020 $ 15,754
Potential consideration year 2018 2,000    
Potential consideration year 2019 $ 1,000