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Consolidated Statements Of Changes In Shareholders' Equity - USD ($)
$ in Thousands
Series A 3% Preferred Stock [Member]
Retained Earnings [Member]
Series A 3% Preferred Stock [Member]
Series B-1 8.48% Preferred Stock [Member]
Retained Earnings [Member]
Series B-1 8.48% Preferred Stock [Member]
Preferred Equity [Member]
Common Stock [Member]
Additional Paid-In Capital [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Loss [Member]
Treasury Stock [Member]
Total
Cumulative-effect adjustment             $ (279) $ 279      
Balance at Dec. 31, 2016         $ 17,340 $ 147 81,755 237,687 $ (13,951) $ (2,924) $ 320,054
Adjusted Balance at Dec. 31, 2016         17,340 147 81,476 237,966 (13,951) (2,924) 320,054
Comprehensive income:                      
Net income               7,943     7,943
Other comprehensive income, net of tax                 765   765
Purchases of common stock for treasury                   (148) (148)
Share-based compensation plans:                      
Share-based compensation             239       239
Stock options exercised             4     239 243
Restricted stock awards forfeited             182     (182)  
Cash dividends declared:                      
Preferred stock dividends per share $ (1) $ (1) $ (364) $ (364)              
Common stock dividends per share               (3,043)     (3,043)
Balance at Mar. 31, 2017         17,340 147 81,901 242,501 (13,186) (3,015) 325,688
Balance at Dec. 31, 2017         17,329 161 121,058 257,078 (11,916) (2,533) 381,177
Comprehensive income:                      
Net income               9,288     9,288
Other comprehensive income, net of tax                 (6,247)   (6,247)
Purchases of common stock for treasury                   (113) (113)
Share-based compensation plans:                      
Share-based compensation             302       302
Stock options exercised             (1)     77 76
Restricted stock awards forfeited             446     (446)  
Cash dividends declared:                      
Preferred stock dividends per share $ (1) $ (1) $ (364) $ (364)              
Common stock dividends per share               (3,816)     (3,816)
Balance at Mar. 31, 2018         $ 17,329 $ 161 $ 121,805 $ 262,185 $ (18,163) $ (3,015) $ 380,302