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Income Taxes (Narrative) (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2015
Income Tax Examination [Line Items]        
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations $ (2,805,000)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations $ 0us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations    
Income tax interest and penalties 100,000us-gaap_IncomeTaxExaminationPenaltiesAndInterestExpense 100,000us-gaap_IncomeTaxExaminationPenaltiesAndInterestExpense 200,000us-gaap_IncomeTaxExaminationPenaltiesAndInterestExpense  
Income tax accrued and penalties 400,000us-gaap_IncomeTaxExaminationPenaltiesAndInterestAccrued 300,000us-gaap_IncomeTaxExaminationPenaltiesAndInterestAccrued    
Scenario, Forecast        
Income Tax Examination [Line Items]        
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations       $ (900,000)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember