XML 12 R39.htm IDEA: XBRL DOCUMENT v2.4.0.8
Derivative Financial Instruments Fair Value (Details) (USD $)
Jun. 30, 2014
Dec. 31, 2013
Fair value of derivative assets and liabilities    
Price Risk Derivatives, at Fair Value, Net $ (140,000,000) $ 21,500,000
Derivative asset current 3,613,000 21,559,000
Derivative asset noncurrent 1,300,000 30,951,000
Derivative liability current 92,088,000 26,380,000
Derivatives liability noncurrent 52,847,000 4,640,000
Derivatives not designated as hedging instruments
    
Fair value of derivative assets and liabilities    
Derivative asset current 3,613,000 21,559,000
Derivative asset noncurrent 1,300,000 30,951,000
Derivative liability current 92,088,000 26,380,000
Derivatives liability noncurrent 52,847,000 4,640,000
Level 2 | Derivatives not designated as hedging instruments | Fair Value, Measurements, Recurring [Member]
    
Fair value of derivative assets and liabilities    
Derivative assets not designated as hedging instruments 4,913,000 52,510,000
Derivative liabilities not designated as hedging instruments $ 144,935,000 $ 31,020,000