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Derivative Instruments (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
Derivative Instruments (Narrative) (Details) (USD $)	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Maximum Length of Time Hedged in Cash Flow Hedge			36 months
Derivative Asset, Fair Value	$ 36,000,000		$ 36,000,000		$ 9,300,000
Derivative Liability, Fair Value	200,000		200,000		10,135,000
Derivative, Gain (Loss) on Derivative, Net	$ 71,783,000	$ (27,658,000)	$ 11,153,000	$ (16,486,000)

Fair value, after the effects of master netting arrangements, of a financial asset or other 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. Includes assets not subject to a master netting arrangement and not elected to be offset.

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- Definition

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. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

+ References+ Details