Discontinued Operations - Discontinued Oil and Gas Operations, Assets and Liabilities, Revenue and Net Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Current Assets:
Accounts receivable, net	$ 3		$ 3		$ 6
Total Current Assets	3		3		6
Total Assets of Discontinued Operations	3		3		6
Current Liabilities:
Trade payables	64		64		29
Revenues and royalties payable	18		18		18
Accrued EPA contingency	3,100		3,100
Accrued liabilities and other	101		101		113
Total Current Liabilities	3,283		3,283		160
Total Liabilities of Discontinued Operations	3,283		3,283		160
Loss from discontinued operations before taxes	$ (3,300)	$ (69)	$ (3,286)	$ (340)