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Note 18 - Earnings Per Common Share | 12 Months Ended
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Dec. 31, 2025
Notes to Financial Statements |
Earnings Per Share [Text Block] | NOTE 18. EARNINGS PER COMMON SHARE Basic earnings per common share are computed by dividing net income available to common stockholders by the weighted average number of common shares outstanding during the period. Diluted earnings per common share include the dilutive effect of additional potential common shares issuable pursuant to the exercise of stock options and vesting of performance shares. The difference in earnings per share under the two-class method was not significant at December 31, 2025, 2024 and 2023.
|  | Year Ended December 31, |
|  | 2025 |  |  | 2024 |  |  | 2023 |
|  | (Dollar Amounts In Thousands Except Per Share Amounts) |
Earnings Per Share |  |  |  |  |  |  |  |  |  |  |  |
Weighted average common shares outstanding |  |  | 54,609,237 |  |  |  | 54,528,302 |  |  |  | 54,411,171 |
Net income available to common stockholders |  | $ | 276,541 |  |  | $ | 227,180 |  |  | $ | 206,791 |
Basic earnings per common share |  | $ | 5.06 |  |  | $ | 4.17 |  |  | $ | 3.80 |
Weighted average common shares outstanding |  |  | 54,609,237 |  |  |  | 54,528,302 |  |  |  | 54,411,171 |
Dilutive effects of assumed exercise of stock options and vesting of performance shares |  |  | 57,037 |  |  |  | 95,932 |  |  |  | 124,144 |
Weighted average common and dilutive potential common shares outstanding |  |  | 54,666,274 |  |  |  | 54,624,234 |  |  |  | 54,535,315 |
Net income available to common stockholders |  | $ | 276,541 |  |  | $ | 227,180 |  |  | $ | 206,791 |
Diluted earnings per common share |  | $ | 5.06 |  |  | $ | 4.16 |  |  | $ | 3.79 |

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