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Stock-Based Compensation (Stock Option Activity) (Details) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Stock-Based Compensation [Abstract]    
Outstanding 163,586us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber 207,303us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Weighted Average Exercise Price $ 15.13us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice $ 15.92us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Issued      
Issued, Weighted Average Exercise Price      
Exercised 93,834us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised   
Exercised, Weighted Average Exercise Price $ 19.60us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice   
Forfeited      
Forfeited, Weighted Average Exercise Price      
Expired      
Expired, Weighted Average Exercise Price      
Outstanding 69,752us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber 207,303us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Weighted Average Exercise Price $ 9.13us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice $ 15.92us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice