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Hedges and Derivative Financial Instruments Hedges and Derivative Financial Instruments (Narrative) (Details) | Dec. 31, 2014 contract | Dec. 31, 2013 contract
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Interest Rate Derivatives [Abstract] |  |
Number of interest rate derivatives held | 0 us-gaap_NumberOfInterestRateDerivativesHeld | 0 us-gaap_NumberOfInterestRateDerivativesHeld

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- Definition Number of interest rate derivative instruments held by the entity at the reporting date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5579245-113959 + Details
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