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Share-Based Compensation and Equity (Textuals) (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common Stock, Dividends, Per Share, Cash Paid $ 1.15 $ 1.14 $ 1.12
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 5,848,474    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 2,348,784    
Stock Options [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Aware, Expiration Period 10 years    
Stock Options [Member] | Minimum [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 4 years    
Stock Options [Member] | Maximum [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 5 years    
Restricted Stock Units [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Conversion to Common Stock (shares) 1    
Restricted Stock Units [Member] | Minimum [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years    
Restricted Stock Units [Member] | Maximum [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 7 years    
Performance Shares [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Performance Period 3 years    
Conversion to Common Stock (shares) 1    
Director Deferred Shares [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Conversion to Common Stock (shares) 1    
Director Deferred Shares [Member] | Minimum [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 6 months    
Director Deferred Shares [Member] | Maximum [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 12 months