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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands | Total | Impact of adoption of ASC 326 | Common Stock | Additional Paid-in Capital | Retained Earnings | Retained Earnings Impact of adoption of ASC 326 | Treasury Stock | Accumulated Other Comprehensive (Loss) Income
--- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2018 | $ 244,583 |  | $ 12,835 | $ 185,174 | $ 80,088 |  | $ (24,352) | $ (9,162)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net earnings | 18,910 |  |  |  | 18,910 |  |  |
Other comprehensive income | 7,484 |  |  |  |  |  |  | 7,484
Exercise of stock options | 553 |  | 24 | 529 |  |  |  |
Purchase of treasury stock | (10,067) |  |  |  |  |  | (10,067) |
Restricted stock grants |  |  | 31 | (31) |  |  |  |
Stock based compensation | 493 |  |  | 493 |  |  |  |
Dividends: Common Stock | (6,051) |  |  |  | (6,051) |  |  |
Ending balance at Sep. 30, 2019 | 255,905 |  | 12,890 | 186,165 | 92,947 |  | (34,419) | (1,678)
Beginning balance at Jun. 30, 2019 | 250,121 |  | 12,886 | 185,918 | 87,492 |  | (33,549) | (2,626)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net earnings | 7,530 |  |  |  | 7,530 |  |  |
Other comprehensive income | 948 |  |  |  |  |  |  | 948
Exercise of stock options | 72 |  | 4 | 68 |  |  |  |
Purchase of treasury stock | (870) |  |  |  |  |  | (870) |
Stock based compensation | 179 |  |  | 179 |  |  |  |
Dividends: Common Stock | (2,075) |  |  |  | (2,075) |  |  |
Ending balance at Sep. 30, 2019 | 255,905 |  | 12,890 | 186,165 | 92,947 |  | (34,419) | (1,678)
Beginning balance at Dec. 31, 2019 | 261,551 | $ (3,593) | 12,905 | 186,692 | 98,239 | $ (3,593) | (34,492) | (1,793)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net earnings | 17,487 |  |  |  | 17,487 |  |  |
Other comprehensive income | 11,364 |  |  |  |  |  |  | 11,364
Exercise of stock options | 72 |  | 4 | 68 |  |  |  |
Purchase of treasury stock | (14,110) |  |  |  |  |  | (14,110) |
Stock based compensation | 494 |  |  | 494 |  |  |  |
Dividends: Common Stock | (6,412) |  |  |  | (6,412) |  |  |
Ending balance at Sep. 30, 2020 | 266,853 |  | 12,909 | 187,254 | 105,721 |  | (48,602) | 9,571
Beginning balance at Jun. 30, 2020 | 258,875 |  | 12,908 | 187,073 | 97,788 |  | (47,969) | 9,075
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net earnings | 10,134 |  |  |  | 10,134 |  |  |
Other comprehensive income | 496 |  |  |  |  |  |  | 496
Exercise of stock options |  |  | 1 | (1) |  |  |  |
Purchase of treasury stock | (633) |  |  |  |  |  | (633) |
Stock based compensation | 182 |  |  | 182 |  |  |  |
Dividends: Common Stock | (2,201) |  |  |  | (2,201) |  |  |
Ending balance at Sep. 30, 2020 | $ 266,853 |  | $ 12,909 | $ 187,254 | $ 105,721 |  | $ (48,602) | $ 9,571

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