Discontinued Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Discontinued Operations
After-tax income (loss) from discontinued operations		$ (15)	$ (76)
Interest expense allocated to discontinued operations	$ 0
Revenue and pre-tax income (loss) related to discontinued operations
Revenue		7	49
Pre-tax loss		(25)	(195)
Operation located in Delaware
Discontinued Operations
After-tax income (loss) from discontinued operations			$ (100)
Operation located in Delaware | Maximum
Discontinued Operations
After-tax income (loss) from discontinued operations		$ (100)