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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares | 3 Months Ended | 6 Months Ended
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Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
COMMON STOCK |  |  |  |
New common shares issued for exercise of stock options, shares | 13 | 6,000 | 27,597 | 14,856
CAPITAL SURPLUS |  |  |  |
New common shares issued for exercise of stock options, shares | 13 | 6,000 | 27,597 | 14,856
RETAINED EARNINGS |  |  |  |
Cash dividend declared per common share | $ 0.030 | $ 0.025 | $ 0.055 | $ 0.050

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