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(6) Equity Investment in Savoy (Details) - Savoy: Oil and Gas Reserves 3 (USD $)
12 Months Ended
Dec. 31, 2013
Savoy: Oil and Gas Reserves 3 [Abstract]  
Beginning of year $ 35,300,000
End of year 90,820,000
Average wellhead prices:  
Oil (per Bbl) 94.66
NGLs (per Bbl) 42.45
Natgas (per Mcf) 3.04
Sales, net of production costs (12,640,000)
Net changes in prices and production costs 1,600,000
Extensions and discoveries 57,200,000
Revisions of previous quantity estimates 2,100,000
Change in production timing and other 3,700,000
Accretion of discount $ 3,560,000