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Note 18 - Earnings Per Common Share (Tables) | 12 Months Ended
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Dec. 31, 2025
Notes Tables |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | 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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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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