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Transactions With Related Parties (Narrative) (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Related Party Transaction [Line Items]      
Number of oil and gas limited partnerships 16    
Number of oil and gas limited partnerships for third party investment 3    
Number of oil and gas limited partnerships for employee investment 13    
Minimum salary for employees to participate in the oil and gas partnership     $ 36,000
Minimum [Member]
     
Related Party Transaction [Line Items]      
Interest rate of employee partnerships in oil and gas properties 1.00%    
Maximum [Member]
     
Related Party Transaction [Line Items]      
Interest rate of employee partnerships in oil and gas properties 15.00%    
Upland Resources [Member]
     
Related Party Transaction [Line Items]      
Number of wells drilled 0 3.0  
Revenue from Related Parties   1,600,000  
Payments for Royalties $ 1,400,000 $ 1,200,000 $ 700,000