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Stock and Incentive Compensation Plans (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Restricted Stock Units (RSUs) [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Return on average tangible equity, performance measure     100.00%  
Total shareholder return, performance measure     100.00%  
Stock and Incentive Compensation Plan [Member]        
Compensation expense [Abstract]        
Total compensation expense $ 957 $ 1,055 $ 2,738 $ 3,290
Stock and Incentive Compensation Plan [Member] | Performance Awards [Member]        
Shares [Roll Forward]        
Outstanding/Nonvested shares, beginning of period (in shares) 212,309   181,195  
Granted (in shares)     84,899  
Exercised or released from restriction (in shares)     (47,360)  
Forfeited (in shares) 0   (6,425)  
Outstanding/Nonvested shares, end of period (in shares) 212,309   212,309  
Compensation expense [Abstract]        
Total compensation expense $ 319 267 $ 883 797
Stock and Incentive Compensation Plan [Member] | Performance Awards Includes Achievement Shares for Grants after 2013 [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period     3 years  
Stock and Incentive Compensation Plan [Member] | Achievement Shares from Performance Grants Prior to 2013 [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period     3 years  
Stock and Incentive Compensation Plan [Member] | Time-Vested Awards [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period     3 years  
Shares [Roll Forward]        
Outstanding/Nonvested shares, beginning of period (in shares) 313,078   263,905  
Granted (in shares)     120,814  
Exercised or released from restriction (in shares)     (64,508)  
Forfeited (in shares) (874)   (8,007)  
Outstanding/Nonvested shares, end of period (in shares) 312,204   312,204  
Compensation expense [Abstract]        
Total compensation expense $ 638 $ 788 $ 1,855 $ 2,493