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Discontinued Operations (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Discontinued Operations        
After-tax loss from discontinued operations     $ 15 $ 54
Interest expense allocated to discontinued operations     0  
Revenue and pre-tax income (loss) related to discontinued operations        
Revenue 12 49 12 22
Pre-tax loss     (25) (93)
Operation located in Delaware | Maximum
       
Discontinued Operations        
After-tax loss from discontinued operations     $ 100 $ 100