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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       33,341     33,341
Other comprehensive income         11,724   11,724
Cash dividends       (45,591)     (45,591)
Balance at Jun. 30, 2019 3 178 32,288 302,984 7,436 (3,019) 339,870
Balance at Mar. 31, 2019 3 178 32,288 298,131 1,012 (3,019) 328,593
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income       14,605     14,605
Other comprehensive income         6,424   6,424
Cash dividends       (9,752)     (9,752)
Balance at Jun. 30, 2019 3 $ 178 32,288 302,984 7,436 $ (3,019) 339,870
Balance at Dec. 31, 2019 275   190,524 134,287 7,832   332,918
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income       13,640     13,640
Other comprehensive income         9,379   9,379
Stock-based compensation     163       163
Cash dividends       (8,260)     (8,260)
Balance at Jun. 30, 2020 275   190,687 139,667 17,211   347,840
Balance at Mar. 31, 2020 275   190,591 136,378 12,569   339,813
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income       7,419     7,419
Other comprehensive income         4,642   4,642
Stock-based compensation     96       96
Cash dividends       (4,130)     (4,130)
Balance at Jun. 30, 2020 $ 275   $ 190,687 $ 139,667 $ 17,211   $ 347,840