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Stock and Incentive Compensation Plans (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 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 (in hundredths)     100.00%  
Total shareholder return, performance measure (in hundredths)     100.00%  
Stock and Incentive Compensation Plan [Member]        
Compensation expense [Abstract]        
Total compensation expense $ 930 $ 1,044 $ 1,781 $ 2,235
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) 0   84,899  
Exercised or released from restriction (in shares) 0   (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 $ 318 267 $ 564 530
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) 318,333   263,905  
Granted (in shares) 500   120,814  
Exercised or released from restriction (in shares) (1,299)   (64,508)  
Forfeited (in shares) (4,456)   (7,133)  
Outstanding/Nonvested shares, end of period (in shares) 313,078   313,078  
Compensation expense [Abstract]        
Total compensation expense $ 612 $ 777 $ 1,217 $ 1,705