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Property, Plant and Equipment Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Property, Plant and Equipment [Line Items]        
Net Book Value of Disposed Property Plant Equipment   $ 5,446    
Impairment charges $ 1,958 0 $ 4,146 $ 0
Gain on sale of land $ 0 $ 10,714 $ 0 $ 10,714