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Earnings per Share (Narrative) (Details)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti-dilutive number of shares 503,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 762,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 973,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Stock Compensation Plan      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti-dilutive number of shares 211,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_StockCompensationPlanMember
177,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_StockCompensationPlanMember