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Consolidated Statements Of Changes In Shareholders' Equity - USD ($)
$ in Thousands
Total
Series B-1 8.48% Preferred Stock [Member]
Series A 3% Preferred Stock [Member]
Preferred Equity [Member]
Preferred Equity [Member]
Series B-1 8.48% Preferred Stock [Member]
Common Stock [Member]
Additional Paid-In Capital [Member]
Retained Earnings [Member]
Retained Earnings [Member]
Series B-1 8.48% Preferred Stock [Member]
Retained Earnings [Member]
Series A 3% Preferred Stock [Member]
Accumulated Other Comprehensive Loss [Member]
Treasury Stock [Member]
Cumulative-effect adjustment             $ (279) $ 279        
Balance at Dec. 31, 2016 $ 320,054     $ 17,340   $ 147 81,755 237,687     $ (13,951) $ (2,924)
Adjusted Balance at Dec. 31, 2016 320,054     17,340   147 81,476 237,966     (13,951) (2,924)
Comprehensive income:                        
Net income 22,468             22,468        
Other comprehensive income, net of tax 3,113                   3,113  
Purchases of common stock for treasury (148)                     (148)
Common stock issued 29,664         11 29,653          
Repurchase of Series B-1 8.48% preferred stock   $ (6)     $ (6)              
Share-based compensation plans:                        
Share-based compensation 885           885          
Stock options exercised 413           5         408
Restricted stock awards issued, net             29         (29)
Stock awards 115           39         76
Cash dividends declared:                        
Preferred stock dividends per share   (1,094) $ (3)           $ (1,094) $ (3)    
Common stock dividends per share (9,459)             (9,459)        
Balance at Sep. 30, 2017 366,002     17,334   158 112,087 249,878     (10,838) (2,617)
Balance at Jun. 30, 2017                     (11,293)  
Comprehensive income:                        
Net income 8,279                      
Other comprehensive income, net of tax 455                   455  
Balance at Sep. 30, 2017 366,002     17,334   158 112,087 249,878     (10,838) (2,617)
Balance at Dec. 31, 2017 381,177     17,329   161 121,058 257,078     (11,916) (2,533)
Comprehensive income:                        
Net income 32,035             32,035        
Other comprehensive income, net of tax (9,904)                   (9,904)  
Purchases of common stock for treasury (113)                     (113)
Share-based compensation plans:                        
Share-based compensation 1,097           1,097          
Stock options exercised 320           (19)         339
Restricted stock awards issued, net             303         (303)
Stock awards 92           39         53
Cash dividends declared:                        
Preferred stock dividends per share   $ (1,093) $ (3)           $ (1,093) $ (3)    
Common stock dividends per share (11,454)             (11,454)        
Balance at Sep. 30, 2018 392,154     17,329   161 122,478 276,563     (21,820) (2,557)
Balance at Jun. 30, 2018                     (20,296)  
Comprehensive income:                        
Net income 10,577                      
Other comprehensive income, net of tax (1,524)                   (1,524)  
Balance at Sep. 30, 2018 $ 392,154     $ 17,329   $ 161 $ 122,478 $ 276,563     $ (21,820) $ (2,557)