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Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Treasury Stock [Member] | AOCI Attributable to Parent [Member] | Total
--- | --- | --- | --- | --- | --- | ---
Beginning balance, value at Dec. 31, 2017 |  | $ 41 | $ 57,772 | $ 30,214 |  | $ (405) | $ 87,622
Net earnings |  |  |  | 10,426 |  |  | 10,426
Other comprehensive income |  |  |  |  |  | (3,579) | (3,579)
Dividends paid ($0.69 per share) (1) | [1] |  |  | (3,325) |  |  | (3,325)
Stock-based compensation |  |  | 223 |  |  |  | 223
Adjustment of common stock investments |  |  |  | 7 |  | (7) |
Exercise of stock options, 72,130 shares (2) | [2] | 1 | 533 |  |  |  | 534
5% stock dividend, 207,794 shares |  | 2 | 5,247 | (5,249) |  |  |
Ending balance, value at Dec. 31, 2018 |  | 44 | 63,775 | 32,073 |  | (3,991) | 91,901
Net earnings |  |  |  | 10,662 |  |  | 10,662
Other comprehensive income |  |  |  |  |  | 9,230 | 9,230
Stock-based compensation |  |  | 286 |  |  |  | 286
Dividends paid ($0.73 per share) (1) | [1] |  |  | (3,508) |  |  | (3,508)
Exercise of stock options, 3,275 shares (2) | [2] |  | 36 |  |  |  | 36
5% stock dividend, 218,589 shares |  | 2 | 4,932 | (4,934) |  |  |
Ending balance, value at Dec. 31, 2019 |  | 46 | 69,029 | 34,293 |  | 5,239 | 108,607
Net earnings |  |  |  | 19,493 |  |  | 19,493
Other comprehensive income |  |  |  |  |  | 4,208 | 4,208
Stock-based compensation |  |  | 304 |  |  |  | 304
Dividends paid ($0.76 per share) (1) | [1] |  |  | (3,633) |  |  | (3,633)
Exercise of stock options, 19,030 shares (2) | [2] |  | 42 |  |  |  | 42
Purchase of 106,894 treasury shares |  |  |  |  | (2,349) |  | (2,349)
5% stock dividend, 225,650 shares |  | 2 | 2,855 | (5,206) | 2,349 |  |
Ending balance, value at Dec. 31, 2020 |  | $ 48 | $ 72,230 | $ 44,947 |  | $ 9,447 | $ 126,672
[1] | Dividends per share have been adjusted to give effect to the 5% stock dividends paid during December 2020, 2019 and 2018.
[2] | Shares from the exercise of stock options are shown net of forfeitures

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