Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Discontinued Operations
After-tax loss from discontinued operations	$ 54	$ 237
Interest expense allocated to discontinued operations	0
Revenue and pre-tax loss related to discontinued operations
Revenue	(27)	2,508
Pre-tax loss	(93)	(399)
Operation located in Delaware
Discontinued Operations
After-tax loss from discontinued operations	$ 100	$ 200