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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
Balance at Dec. 31, 2014         $ 17,340 $ 144 $ 72,955 $ 203,312 $ (9,011) $ (5,208) $ 279,532
Comprehensive income:                      
Net income               21,702     21,702
Other comprehensive income, net of tax                 2,959   2,959
Purchases of common stock for treasury                   (41) (41)
Share-based compensation plans:                      
Share-based compensation             520       520
Stock options exercised             1     251 252
Restricted stock awards issued, net             (1,060)     1,060  
Stock awards             11     43 54
Cash dividends declared:                      
Preferred stock dividends per share $ (3) $ (3) $ (1,094) $ (1,094)              
Common stock dividends per share               (8,447)     (8,447)
Balance at Sep. 30, 2015         17,340 144 72,427 215,470 (6,052) (3,895) 295,434
Balance at Dec. 31, 2015         17,340 144 72,690 218,920 (11,327) (3,923) 293,844
Comprehensive income:                      
Net income               23,238     23,238
Other comprehensive income, net of tax                 9,366   9,366
Common stock issued           3 8,097       8,100
Share-based compensation plans:                      
Share-based compensation             597       597
Stock options exercised             20     794 814
Restricted stock awards issued, net             24     (24)  
Excess tax benefit on share-based compensation             10       10
Stock awards             21     43 64
Cash dividends declared:                      
Preferred stock dividends per share $ (3) $ (3) $ (1,094) $ (1,094)              
Common stock dividends per share               (8,665)     (8,665)
Balance at Sep. 30, 2016         $ 17,340 $ 147 $ 81,459 $ 232,396 $ (1,961) $ (3,110) $ 326,271