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Income Taxes Income Tax Examination (Details) (Domestic Tax Authority, Internal Revenue Service (IRS), USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Domestic Tax Authority | Internal Revenue Service (IRS)
 
Income Tax Examination [Line Items]  
Settled assessments $ 907us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_DomesticCountryMember
/ us-gaap_IncomeTaxAuthorityNameAxis
= us-gaap_InternalRevenueServiceIRSMember