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Discontinued Operations (Results of Operations Associated with Discontinued Operations) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Discontinued Operations [Abstract]        
Revenues $ 717 $ 151 $ 1,739 $ 835
Income (loss) before income taxes (217) 25 752 708
Income (loss) from discontinued operations $ (217) $ 25 $ 752 $ 708