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Discontinued Operations and Assets Held for Sale (Results of Operations Associated with Discontinued Operations) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Discontinued Operations and Assets Held for Sale [Abstract]        
Revenues $ 6 $ 126 $ 6 $ 256
Income (loss) before income taxes (398) (217) (835) 752
Income tax benefit
Income (loss) from discontinued operations $ (398) $ (217) [1] $ (835) $ 752 [1]
[1] Reclassified to conform to current presentation (see Notes A and B).