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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands | Voting Common Stock | Series A Nonvoting Common Stock | Surplus | Retained Earnings | Accumulated Other Comprehensive Income (Loss) | Treasury Stock | Total
--- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2018 | $ 3 | $ 178 | $ 32,288 | $ 315,234 | $ (4,288) | $ (3,019) | $ 340,396
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income |  |  |  | 50,778 |  |  | 50,778
Other comprehensive income |  |  |  |  | 12,719 |  | 12,719
Cash dividends |  |  |  | (54,957) |  |  | (54,957)
Balance at Sep. 30, 2019 | 3 | 178 | 32,288 | 311,055 | 8,431 | (3,019) | 348,936
Balance at Jun. 30, 2019 | 3 | 178 | 32,288 | 302,984 | 7,436 | (3,019) | 339,870
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income |  |  |  | 17,437 |  |  | 17,437
Other comprehensive income |  |  |  |  | 995 |  | 995
Cash dividends |  |  |  | (9,366) |  |  | (9,366)
Balance at Sep. 30, 2019 | 3 | $ 178 | 32,288 | 311,055 | 8,431 | $ (3,019) | 348,936
Balance at Dec. 31, 2019 | 275 |  | 190,524 | 134,287 | 7,832 |  | 332,918
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income |  |  |  | 24,203 |  |  | 24,203
Other comprehensive income |  |  |  |  | 10,299 |  | 10,299
Stock-based compensation |  |  | 263 |  |  |  | 263
Cash dividends |  |  |  | (12,389) |  |  | (12,389)
Balance at Sep. 30, 2020 | 275 |  | 190,787 | 146,101 | 18,131 |  | 355,294
Balance at Jun. 30, 2020 | 275 |  | 190,687 | 139,667 | 17,211 |  | 347,840
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income |  |  |  | 10,563 |  |  | 10,563
Other comprehensive income |  |  |  |  | 920 |  | 920
Stock-based compensation |  |  | 100 |  |  |  | 100
Cash dividends |  |  |  | (4,129) |  |  | (4,129)
Balance at Sep. 30, 2020 | $ 275 |  | $ 190,787 | $ 146,101 | $ 18,131 |  | $ 355,294

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