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Discontinued Operations (Schedule of Discontinued Operation Financial Position) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Discontinued Operations [Abstract]      
Trade and other receivables   $ 16,526  
Inventories   11,219  
Fixed and intangible assets   763  
Trade payables   (4,426)  
Other payables   (6,922)  
Net assets and liabilities   17,160  
Net cash consideration   29,967  
Gain on sale of discontinued operation $ 12,800 $ 12,807