(6) Equity Investment in Savoy (Details) - Savoy: Oil and Gas Reserves 1	12 Months Ended
	Dec. 31, 2013 Boe
Oil (Bbls)
Results of Operations for Oil and Gas Producing Activities, by Geographic Area [Line Items]
January 1, 2013	700,000
December 31, 2013	1,469,000
Proved developed reserves	746,000
Proved undeveloped reserves (PUDs)	723,000
Extensions and discoveries	898,000
Production	(153,000)
Revisions to previous estimates	24,000
NGLs (Bbls)
Results of Operations for Oil and Gas Producing Activities, by Geographic Area [Line Items]
January 1, 2013	29,000
December 31, 2013	99,000
Proved developed reserves	60,000
Proved undeveloped reserves (PUDs)	39,000
Extensions and discoveries	58,000
Production	(11,000)
Revisions to previous estimates	23,000
Natural Gas, Per Thousand Cubic Feet [Member]
Results of Operations for Oil and Gas Producing Activities, by Geographic Area [Line Items]
January 1, 2013 (in Thousands of Cubic Feet of Gas Equivalent)	1,108,000
December 31, 2013 (in Thousands of Cubic Feet of Gas Equivalent)	1,301,000
Proved developed reserves (in Thousands of Cubic Feet of Gas Equivalent)	450,000
Proved undeveloped reserves (PUDs) (in Thousands of Cubic Feet of Gas Equivalent)	851,000
Extensions and discoveries (in Thousands of Cubic Feet of Gas Equivalent)	442,000
Production (in Thousands of Cubic Feet of Gas Equivalent)	(96,000)
Revisions to previous estimates (in Thousands of Cubic Feet of Gas Equivalent)	(153,000)