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Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Income Tax Disclosure [Abstract] |  |
Unrecognized tax benefit that, if recognized, would favorably affect our effective income tax rate | $ 16.6 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate |
Accrued interest related to uncertain tax positions | $ 3.1 us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued | $ 2.7 us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued

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- Definition Amount of interest expense accrued for an underpayment of income taxes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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