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Earnings Per Common Share And Share Awards Share Awards Share-Based Assumptions (Details)
6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Earnings Per Share [Abstract]    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 7 years 6 years 10 months 24 days
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate 40.70% 39.90%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 2.00% 2.10%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate 0.40% 0.40%