Hedging Activities (Schedule Of Derivative Instruments In Statement Of Financial Position) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
General Discussion of Derivative Instruments and Hedging Activities [Abstract]
Long-term derivative instruments - asset	$ 2,565	$ 521
Short-term derivative instruments - liabilities	29,755	12,280
Long-term derivative instruments - liability	$ 4,277	$ 11,366

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References+ Details