Quarterly report pursuant to Section 13 or 15(d)

Property And Equipment (Summary Of Oil And Gas Properties Not Subject To Amortization) (Details)

v2.4.0.6
Property And Equipment (Summary Of Oil And Gas Properties Not Subject To Amortization) (Details) (USD $)
Mar. 31, 2012
Dec. 31, 2011
Capitalized costs of oil and natural gas properties excluded from amortization $ 175,587,000 $ 138,623,000
West Texas Permian Properties [Member]
    
Capitalized costs of oil and natural gas properties excluded from amortization 13,843,000  
Colorado Properties [Member]
    
Capitalized costs of oil and natural gas properties excluded from amortization 4,441,000  
Bakken Properties [Member]
    
Capitalized costs of oil and natural gas properties excluded from amortization 304,000  
Southern Louisiana Properties [Member]
    
Capitalized costs of oil and natural gas properties excluded from amortization 357,000  
Ohio Properties [Member]
    
Capitalized costs of oil and natural gas properties excluded from amortization 150,887,000  
Belize Properties [Member]
    
Capitalized costs of oil and natural gas properties excluded from amortization 5,711,000  
Other Properties [Member]
    
Capitalized costs of oil and natural gas properties excluded from amortization $ 44,000