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Discontinued Operations (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended
Jan. 22, 2018
Mar. 31, 2019
Mar. 31, 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   $ 0 $ 15,730
Contingent Consideration, Earn-out $ 3,000    
Earn out performance metrics period 2 years