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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

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