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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]
Common Stock [Member]
Additional Paid-In Capital [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 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 14,189           14,189        
Other comprehensive income, net of tax 2,658                 2,658  
Purchases of common stock for treasury (148)                   (148)
Common stock issued 16,708       6 16,702          
Share-based compensation plans:                      
Share-based compensation 605         605          
Stock options exercised 379         5         374
Restricted stock awards issued, net           29         (29)
Stock awards 115         39         76
Cash dividends declared:                      
Preferred stock dividends per share   $ (2) $ (729)         $ (2) $ (729)    
Common stock dividends per share (6,188)           (6,188)        
Balance at Jun. 30, 2017 347,641     17,340 153 98,856 245,236     (11,293) (2,651)
Balance at Mar. 31, 2017                   (13,186)  
Comprehensive income:                      
Net income 6,246                    
Other comprehensive income, net of tax 1,893                 1,893  
Balance at Jun. 30, 2017 347,641     17,340 153 98,856 245,236     (11,293) (2,651)
Balance at Dec. 31, 2017 381,177     17,329 161 121,058 257,078     (11,916) (2,533)
Comprehensive income:                      
Net income 21,458           21,458        
Other comprehensive income, net of tax (8,380)                 (8,380)  
Purchases of common stock for treasury (113)                   (113)
Share-based compensation plans:                      
Share-based compensation 759         759          
Stock options exercised 309         (15)         324
Restricted stock awards issued, net           303         (303)
Stock awards 92         39         53
Cash dividends declared:                      
Preferred stock dividends per share   $ (2) $ (729)         $ (2) $ (729)    
Common stock dividends per share (7,634)           (7,634)        
Balance at Jun. 30, 2018 386,937     17,329 161 122,144 270,171     (20,296) (2,572)
Balance at Mar. 31, 2018                   (18,163)  
Comprehensive income:                      
Net income 12,170                    
Other comprehensive income, net of tax (2,133)                 (2,133)  
Balance at Jun. 30, 2018 $ 386,937     $ 17,329 $ 161 $ 122,144 $ 270,171     $ (20,296) $ (2,572)