Annual report pursuant to Section 13 and 15(d)

Hedging Activities (Schedule Of Derivative Instruments In Statement Of Financial Position) (Details)

v2.4.1.9
Hedging Activities (Schedule Of Derivative Instruments In Statement Of Financial Position) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
General Discussion of Derivative Instruments and Hedging Activities [Abstract]    
Short-term derivative instruments $ 78,391us-gaap_DerivativeAssetsCurrent $ 324us-gaap_DerivativeAssetsCurrent
Long-term derivative instruments - asset 24,448us-gaap_DerivativeInstrumentsAndHedgesNoncurrent 521us-gaap_DerivativeInstrumentsAndHedgesNoncurrent
Short-term derivative instruments - liabilities 0us-gaap_DerivativeLiabilitiesCurrent 12,280us-gaap_DerivativeLiabilitiesCurrent
Long-term derivative instruments - liability $ 0us-gaap_DerivativeLiabilitiesNoncurrent $ 11,366us-gaap_DerivativeLiabilitiesNoncurrent