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Segment Information (Geographic Information) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Segment Reporting Information [Line Items]      
Revenues $ 5,197 $ 70,708  
Operating Segments [Member]      
Segment Reporting Information [Line Items]      
Revenues 5,197 70,708  
Long-Lived Assets 133,449   $ 133,971
Operating Segments [Member] | United States [Member]      
Segment Reporting Information [Line Items]      
Revenues 5,197 $ 70,708  
Long-Lived Assets 130,008   132,825
Operating Segments [Member] | Mexico [Member]      
Segment Reporting Information [Line Items]      
Long-Lived Assets $ 3,441   $ 1,146