Assets Held-for-Sale and Discontinued Operations (Details 2) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Discontinued operations
Undiscounted contractual commitments	$ 65,300,000
Liability related to discontinued operation	25,900,000		40,200,000
Current liability to discontinued operations	8,354,000		19,602,000
Income (loss) from discontinued operations
Income (loss) from discontinued operations, net of tax	(817,000)	1,515,000
Oil and Gas
Operating revenues
Operating revenues	1,450,000	5,057,000
Income (loss) from discontinued operations
Income (loss) from discontinued operations	(1,386,000)	2,618,000
Less: Impairment charges or other (gains) and losses on sale of wholly owned assets and obligations		1,002,000
Less: Income tax expense (benefit)	(569,000)	101,000
Income (loss) from discontinued operations, net of tax	$ (817,000)	$ 1,515,000