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Note 13 - Employee and Director Benefits (Tables) | 12 Months Ended
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Dec. 31, 2023
Notes Tables |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  | Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Term (years) |  |  | Aggregate Intrinsic Value |
|  |  |  |  |  |  |  |  |  |  |  |  |  | (In Thousands) |
Year Ended December 31, 2023: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding at beginning of year |  |  | 280,000 |  |  | $ | 19.43 |  |  |  | 3.0 |  |  | $ | 14,088 |
Exercised |  |  | (112,200 | ) |  |  | 11.84 |  |  |  | 0.7 |  |  |  | 6,148 |
Forfeited |  |  | (2,000 | ) |  |  | 34.64 |  |  |  | 5.1 |  |  |  | 64 |
Outstanding at end of year |  |  | 165,800 |  |  |  | 24.35 |  |  |  | 2.9 |  |  |  | 7,211 |
Exercisable at December 31, 2023: |  |  | 143,300 |  |  | $ | 21.84 |  |  |  | 2.2 |  |  | $ | 6,419 |
Year Ended December 31, 2022: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding at beginning of year |  |  | 353,250 |  |  | $ | 19.28 |  |  |  | 3.8 |  |  | $ | 23,525 |
Exercised |  |  | (70,500 | ) |  |  | 17.96 |  |  |  | 2.2 |  |  |  | 3,592 |
Forfeited |  |  | (2,750 | ) |  |  | 37.94 |  |  |  | 5.4 |  |  |  | 85 |
Outstanding at end of year |  |  | 280,000 |  |  |  | 19.43 |  |  |  | 3.0 |  |  |  | 14,088 |
Exercisable at December 31, 2022: |  |  | 220,500 |  |  | $ | 14.37 |  |  |  | 2.0 |  |  | $ | 12,279 |
Year Ended December 31, 2021: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding at beginning of year |  |  | 641,450 |  |  | $ | 18.15 |  |  |  | 4.6 |  |  | $ | 16,985 |
Exercised |  |  | (278,200 | ) |  |  | 12.58 |  |  |  | 2.8 |  |  |  | 20,131 |
Forfeited |  |  | (10,000 | ) |  |  | 38.38 |  |  |  | 5.2 |  |  |  | 466 |
Outstanding at end of year |  |  | 353,250 |  |  |  | 19.28 |  |  |  | 3.8 |  |  |  | 23,525 |
Exercisable at December 31, 2021: |  |  | 264,000 |  |  | $ | 12.89 |  |  |  | 2.8 |  |  | $ | 19,353 |
Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] |
Range of Exercise Price |  |  | Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Term (years) |  |  | Aggregate Intrinsic Value |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (In Thousands) |
$ | 6.00 - 7.00 |  |  |  | 7,500 |  |  |  | 6.92 |  |  |  | 0.1 |  |  |  | 448 |
| 15.00 - 16.00 |  |  |  | 42,800 |  |  |  | 15.52 |  |  |  | 1.1 |  |  |  | 2,188 |
| 17.00 - 18.00 |  |  |  | 21,500 |  |  |  | 17.17 |  |  |  | 1.3 |  |  |  | 1,063 |
| 18.00 - 19.00 |  |  |  | 6,000 |  |  |  | 18.49 |  |  |  | 1.7 |  |  |  | 289 |
| 19.00 - 20.00 |  |  |  | 24,000 |  |  |  | 19.16 |  |  |  | 2.1 |  |  |  | 1,139 |
| 25.00 - 26.00 |  |  |  | 4,000 |  |  |  | 25.41 |  |  |  | 2.7 |  |  |  | 165 |
| 33.00-34.00 |  |  |  | 2,000 |  |  |  | 33.48 |  |  |  | 5.0 |  |  |  | 66 |
| 35.00-36.00 |  |  |  | 25,000 |  |  |  | 35.65 |  |  |  | 4.8 |  |  |  | 775 |
| 38.00 - 39.00 |  |  |  | 8,000 |  |  |  | 38.29 |  |  |  | 3.1 |  |  |  | 227 |
| 41.00 - 42.00 |  |  |  | 1,000 |  |  |  | 41.21 |  |  |  | 4.1 |  |  |  | 25 |
| 43.00 - 44.00 |  |  |  | 1,500 |  |  |  | 43.80 |  |  |  | 4.5 |  |  |  | 34 |
|  |  |  |  | 143,300 |  |  | $ | 21.84 |  |  |  | 2.2 |  |  | $ | 6,419 |
Share-Based Payment Arrangement, Outstanding Award, Activity, Excluding Option [Table Text Block] |
|  | Restricted Stock |  |  | PSU |
|  | Shares |  |  | Weighted Average Grant Date Fair Value |  |  | Shares |  |  | Weighted Average Grant Date Fair Value |
Year Ended December 31, 2023: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-vested at beginning of year |  |  | 141,580 |  |  | $ | 56.39 |  |  |  | 23,852 |  |  | $ | 54.16 |
Granted |  |  | 64,880 |  |  |  | 58.45 |  |  |  | 8,092 |  |  |  | 70.29 |
Vested |  |  | (35,163 | ) |  |  | 49.85 |  |  |  | - |  |  |  | - |
Forfeited |  |  | (12,999 | ) |  |  | 63.78 |  |  |  | - |  |  |  | - |
Non-vested at end of year |  |  | 158,298 |  |  |  | 58.08 |  |  |  | 31,944 |  |  |  | 58.25 |
Year Ended December 31, 2022: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-vested at beginning of year |  |  | 126,975 |  |  | $ | 42.74 |  |  |  | 12,437 |  |  | $ | 37.05 |
Granted |  |  | 53,974 |  |  |  | 83.24 |  |  |  | 11,415 |  |  |  | 72.81 |
Vested |  |  | (28,160 | ) |  |  | 43.27 |  |  |  | - |  |  |  | - |
Forfeited |  |  | (11,209 | ) |  |  | 58.82 |  |  |  | - |  |  |  | - |
Non-vested at end of year |  |  | 141,580 |  |  |  | 56.39 |  |  |  | 23,852 |  |  |  | 54.16 |
Year Ended December 31, 2021: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-vested at beginning of year |  |  | 84,307 |  |  | $ | 34.93 |  |  |  | - |  |  | $ | - |
Granted |  |  | 69,295 |  |  |  | 48.92 |  |  |  | 12,437 |  |  |  | 37.05 |
Vested |  |  | (14,274 | ) |  |  | 29.33 |  |  |  | - |  |  |  | - |
Forfeited |  |  | (12,353 | ) |  |  | 39.60 |  |  |  | - |  |  |  | - |
Non-vested at end of year |  |  | 126,975 |  |  |  | 42.74 |  |  |  | 12,437 |  |  |  | 37.05 |

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