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Note 7 - Employee and Director Benefits (Tables) | 3 Months Ended
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Mar. 31, 2025
Notes Tables |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  |  |  |  |  |  |  |  |  | Weighted |  |  |  |  |
|  |  |  |  |  | Weighted |  |  | Average |  |  |  |  |
|  |  |  |  |  | Average |  |  | Remaining |  |  |  |  |
|  |  |  |  |  | Exercise |  |  | Contractual |  |  | Aggregate |
|  | Shares |  |  | Price |  |  | Term (years) |  |  | Intrinsic Value |
|  |  |  |  |  |  |  |  |  |  |  |  |  | (In Thousands) |
Three Months Ended March 31, 2025: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding January 1, 2025 |  |  | 80,450 |  |  | $ | 26.03 |  |  |  | 1.9 |  |  | $ | 4,723 |
Exercised |  |  | (12,250 | ) |  |  | 15.76 |  |  |  | - |  |  |  | 819 |
Outstanding March 31, 2025 |  |  | 68,200 |  |  | $ | 27.88 |  |  |  | 2.0 |  |  | $ | 3,732 |
Exercisable March 31, 2025 |  |  | 68,200 |  |  | $ | 27.88 |  |  |  | 2.0 |  |  | $ | 3,732 |
Three Months Ended March 31, 2024: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding January 1, 2024 |  |  | 165,800 |  |  | $ | 24.35 |  |  |  | 2.9 |  |  | $ | 7,211 |
Exercised |  |  | (8,300 | ) |  |  | 15.74 |  |  |  | 0.9 |  |  |  | 420 |
Outstanding March 31, 2024 |  |  | 157,500 |  |  | $ | 24.80 |  |  |  | 2.7 |  |  | $ | 6,744 |
Exercisable March 31, 2024 |  |  | 140,000 |  |  | $ | 22.63 |  |  |  | 2.1 |  |  | $ | 6,122 |
Share-Based Payment Arrangement, Outstanding Award, Activity, Excluding Option [Table Text Block] |
|  | Restricted Stock |  |  | Performance Shares |
|  |  |  |  |  | Weighted |  |  |  |  |  |  | Weighted |
|  |  |  |  |  | Average Grant |  |  |  |  |  |  | Average Grant |
|  | Shares |  |  | Date Fair Value |  |  | Shares |  |  | Date Fair Value |
Three Months Ended March 31, 2025: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unvested at January 1, 2025 |  |  | 145,837 |  |  | $ | 66.35 |  |  |  | 30,065 |  |  | $ | 70.45 |
Granted |  |  | 20,104 |  |  |  | 90.49 |  |  |  | 6,316 |  |  |  | 84.64 |
Additional performance share attainment |  |  | - |  |  |  | - |  |  |  | 290 |  |  |  | 89.68 |
Vested |  |  | (25,229 | ) |  |  | 59.42 |  |  |  | (5,813 | ) |  |  | 75.28 |
Forfeited |  |  | (1,266 | ) |  |  | 79.02 |  |  |  | - |  |  |  | - |
Unvested at March 31, 2025 |  |  | 139,446 |  |  | $ | 70.97 |  |  |  | 30,858 |  |  | $ | 72.63 |
Three Months Ended March 31, 2024: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unvested at January 1, 2024 |  |  | 158,298 |  |  | $ | 58.08 |  |  |  | 31,944 |  |  | $ | 58.25 |
Granted |  |  | 21,835 |  |  |  | 67.12 |  |  |  | 8,894 |  |  |  | 67.90 |
Additional performance share attainment |  |  | - |  |  |  | - |  |  |  | 6,216 |  |  |  | 68.18 |
Vested |  |  | (25,107 | ) |  |  | 48.19 |  |  |  | (18,653 | ) |  |  | 37.05 |
Forfeited |  |  | (576 | ) |  |  | 71.43 |  |  |  | - |  |  |  | - |
Unvested at March 31, 2024 |  |  | 154,450 |  |  | $ | 60.92 |  |  |  | 28,401 |  |  | $ | 77.37 |

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