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Consolidated Statements of Changes in Shareholders' Equity - USD ($)
$ in Thousands
Total
Series A 3% Preferred Stock [Member]
Series B-1 8.48% Preferred Stock [Member]
Preferred Equity [Member]
Preferred Equity [Member]
Series A 3% Preferred Stock [Member]
Preferred Equity [Member]
Series B-1 8.48% Preferred Stock [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Additional Paid-in Capital [Member]
Series A 3% Preferred Stock [Member]
Retained Earnings [Member]
Retained Earnings [Member]
Series A 3% Preferred Stock [Member]
Retained Earnings [Member]
Series B-1 8.48% Preferred Stock [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Treasury Stock [Member]
Balance at Dec. 31, 2016 $ 320,054     $ 17,340     $ 147 $ 81,476   $ 237,966     $ (13,951) $ (2,924)
Comprehensive income:                            
Net income 33,526                 33,526        
Other comprehensive income (loss), net of tax 2,035                       2,035  
Common stock issued 38,303           14 38,289            
Purchase of common stock for treasury (148)                         (148)
Repurchase of preferred stock   $ (3) $ (6)   $ (5) $ (6)     $ 2          
Share-based compensation plans:                            
Share-based compensation 1,174             1,174            
Stock options exercised 413             5           408
Restricted stock awards issued, net               21           (21)
Stock awards 243             91           152
Cash dividends declared:                            
Preferred stock dividends per share   (4) (1,458)               $ (4) $ (1,458)    
Common stock dividends per share (12,952)                 (12,952)        
Balance at Dec. 31, 2017 381,177     17,329     161 121,058   257,078     (11,916) (2,533)
Comprehensive income:                            
Net income 39,526                 39,526        
Other comprehensive income (loss), net of tax (9,365)                       (9,365)  
Purchase of common stock for treasury (113)                         (113)
Repurchase of preferred stock   (1)     $ (1)                  
Share-based compensation plans:                            
Share-based compensation 1,301             1,301            
Stock options exercised 320             (19)           339
Restricted stock awards issued, net               303           (303)
Stock awards 185             61           124
Cash dividends declared:                            
Preferred stock dividends per share   (4) (1,457)               (4) (1,457)    
Common stock dividends per share (15,276)                 (15,276)        
Balance at Dec. 31, 2018 396,293     17,328     161 122,704   279,867     (21,281) (2,486)
Cumulative-effect adjustment at Dec. 31, 2018 (710)                 (710)        
Adjusted balance at Dec. 31, 2018 395,583     17,328     161 122,704   279,157     (21,281) (2,486)
Comprehensive income:                            
Net income 48,862                 48,862        
Other comprehensive income (loss), net of tax 9,551                       9,551  
Reclassification of income tax effects                   2,783     (2,783)  
Common stock issued 1,151             1,151            
Purchase of common stock for treasury (293)                         (293)
Share-based compensation plans:                            
Share-based compensation 1,406             1,406            
Restricted stock units released               (554)           554
Restricted stock awards issued, net               (165)           165
Stock awards 125             40           85
Cash dividends declared:                            
Preferred stock dividends per share   $ (4) $ (1,457)               $ (4) $ (1,457)    
Common stock dividends per share (15,977)                 (15,977)        
Balance at Dec. 31, 2019 $ 438,947     $ 17,328     $ 161 $ 124,582   $ 313,364     $ (14,513) $ (1,975)