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Oil and Gas Reserves (Unaudited): Costs Incurred Oil and Gas (Details) - Discontinued Operations, Held-for-sale or Disposed of by Sale
$ in Thousands
12 Months Ended
Dec. 31, 2016
USD ($)
Costs Incurred, Acquisition of Oil and Gas Properties [Abstract]  
Proved Reserves $ 0
Unproved Reserves 910
Exploration Costs 1,102
Development Costs 4,657
Asset Retirement Obligation Incurred 0
Oil and Gas Property Acquisition, Exploration, and Development Activities $ 6,669