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Acquisition (Details) - USD ($)
$ in Thousands
6 Months Ended
Mar. 09, 2018
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Acquisition [Abstract]        
Acquisition of new businesses   $ (11,313) $ 0  
Goodwill   $ 409,022   $ 408,995
Globe Natural [Member]        
Acquisition [Abstract]        
Acquisition of new businesses $ (10,800)      
Net assets acquired 2,100      
Goodwill 6,700      
Globe Natural [Member] | Customer Relationships [Member]        
Acquisition [Abstract]        
Intangibles assets acquired $ 2,000