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Note 19 - Stock-based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2022
Notes Tables |
Schedule of Share-based Compensation Arrangement by Share-based Payment Award Fair Value Assumptions and Methodology [Table Text Block] |
|  | 2022 |  |  | 2021 |  |  | 2020 |
Dividend yield |  |  | 2.38 | % |  |  | 2.52 | % |  |  | 2.51 | %
Expected volatility |  |  | 25.43 | % |  |  | 25.19 | % |  |  | 20.87 | %
Risk free interest rate |  |  | 1.98 | % |  |  | 1.22 | % |  |  | 1.25 | %
Expected life of SARs (in years) |  |  | 7.1 |  |  |  | 7.1 |  |  |  | 7.1 |
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] |
|  | Year Ended December 31, 2022 |
(in thousands) |  | Stock Appreciation Rights |  |  | Restricted Stock Awards |  |  | Restricted Stock Units |  |  | Performance Stock Units |  |  | Total |
Expense |  | $ | 376 |  |  | $ | 1,373 |  |  | $ | 332 |  |  | $ | 2,313 |  |  | $ | 4,394 |
Deferred tax benefit |  |  | (79 | ) |  |  | (289 | ) |  |  | (70 | ) |  |  | (486 | ) |  |  | (924 | )
Total net expense |  | $ | 297 |  |  | $ | 1,084 |  |  | $ | 262 |  |  | $ | 1,827 |  |  | $ | 3,470 |
|  | Year Ended December 31, 2021 |
(in thousands) |  | Stock Appreciation Rights |  |  | Restricted Stock Awards |  |  | Restricted Stock Units |  |  | Performance Stock Units |  |  | Total |
Expense |  | $ | 352 |  |  | $ | 1,288 |  |  | $ | 312 |  |  | $ | 2,613 |  |  | $ | 4,565 |
Deferred tax benefit |  |  | (74 | ) |  |  | (271 | ) |  |  | (66 | ) |  |  | (549 | ) |  |  | (960 | )
Total net expense |  | $ | 278 |  |  | $ | 1,017 |  |  | $ | 246 |  |  | $ | 2,064 |  |  | $ | 3,605 |
|  | Year Ended December 31, 2020 |
(in thousands) |  | Stock Appreciation Rights |  |  | Restricted Stock Awards |  |  | Restricted Stock Units |  |  | Performance Stock Units |  |  | Total |
Expense |  | $ | 352 |  |  | $ | 1,346 |  |  | $ | 270 |  |  | $ | 1,294 |  |  | $ | 3,262 |
Deferred tax benefit |  |  | (74 | ) |  |  | (283 | ) |  |  | (57 | ) |  |  | (272 | ) |  |  | (686 | )
Total net expense |  | $ | 278 |  |  | $ | 1,063 |  |  | $ | 213 |  |  | $ | 1,022 |  |  | $ | 2,576 |
Share-Based Payment Arrangement, Nonvested Award, Cost [Table Text Block] |
(in thousands) Year Ended |  | Stock Appreciation Rights |  |  | Restricted Stock Awards |  |  | Restricted Stock Units |  |  | Performance Stock Units |  |  | Total |
2023 |  | $ | 315 |  |  | $ | 1,181 |  |  | $ | 2 |  |  | $ | 1,555 |  |  | $ | 3,053 |
2024 |  |  | 209 |  |  |  | 959 |  |  |  | — |  |  |  | 854 |  |  |  | 2,022 |
2025 |  |  | 150 |  |  |  | 729 |  |  |  | — |  |  |  | — |  |  |  | 879 |
2026 |  |  | 92 |  |  |  | 415 |  |  |  | — |  |  |  | — |  |  |  | 507 |
2027 |  |  | 14 |  |  |  | 45 |  |  |  | — |  |  |  | — |  |  |  | 59 |
Total estimated expense |  | $ | 780 |  |  | $ | 3,329 |  |  | $ | 2 |  |  | $ | 2,409 |  |  | $ | 6,520 |
Share-Based Payment Arrangement, Option and Stock Appreciation Rights, Activity [Table Text Block] |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Weighted |
|  |  |  |  |  |  |  |  |  |  |  | Weighted |  |  |  |  |  |  | Weighted |  |  | average |
|  |  |  |  |  |  |  |  |  |  |  | average |  |  | Aggregate |  |  | average |  |  | remaining |
|  |  |  |  |  | Exercise |  |  | exercise |  |  | intrinsic |  |  | fair |  |  | contractual |
(in thousands, except per share and years) |  | SARs |  |  | price |  |  | price |  |  | value(1) |  |  | value |  |  | life (in years) |
Outstanding, January 1, 2020 |  |  | 641 |  |  |  | $14.02 | - | $40.00 |  |  | $ | 25.06 |  |  | $ | 10,250 |  |  | $ | 4.10 |  |  |  | 5.3 |
Granted |  |  | 48 |  |  |  | 37.30 | - | 37.30 |  |  |  | 37.30 |  |  |  | 154 |  |  |  | 5.80 |  |  |  |  |
Exercised |  |  | (96 | ) |  |  | 14.02 | - | 25.76 |  |  |  | 16.33 |  |  |  | 2,401 |  |  |  | 2.88 |  |  |  |  |
Forfeited |  |  | — |  |  |  |  | — |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  |  |
Outstanding, December 31, 2020 |  |  | 593 |  |  |  | $15.24 | - | $40.00 |  |  | $ | 27.47 |  |  | $ | 7,706 |  |  | $ | 4.44 |  |  |  | 5.1 |
Outstanding, January 1, 2021 |  |  | 593 |  |  |  | $15.24 | - | $40.00 |  |  | $ | 27.47 |  |  | $ | 7,706 |  |  | $ | 4.44 |  |  |  | 5.1 |
Granted |  |  | 30 |  |  |  | 47.17 | - | 50.71 |  |  |  | 50.48 |  |  |  | — |  |  |  | 9.69 |  |  |  |  |
Exercised |  |  | (108 | ) |  |  | 15.24 | - | 19.37 |  |  |  | 16.40 |  |  |  | 4,239 |  |  |  | 2.85 |  |  |  |  |
Forfeited |  |  | — |  |  |  |  | — |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  |  |
Outstanding, December 31, 2021 |  |  | 515 |  |  |  | $15.24 | - | $50.71 |  |  | $ | 31.16 |  |  | $ | 16,854 |  |  | $ | 5.08 |  |  |  | 5.1 |
Outstanding, January 1, 2022 |  |  | 515 |  |  |  | $15.24 | - | $50.71 |  |  | $ | 31.16 |  |  | $ | 16,854 |  |  | $ | 5.08 |  |  |  | 5.1 |
Granted |  |  | 34 |  |  |  | 47.17 | - | 74.92 |  |  |  | 55.45 |  |  |  | — |  |  |  | 12.07 |  |  |  |  |
Exercised |  |  | (114 | ) |  |  | 15.24 | - | 40.00 |  |  |  | 21.55 |  |  |  | 5,258 |  |  |  | 3.63 |  |  |  |  |
Forfeited |  |  | — |  |  |  |  | — |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  |  |
Outstanding, December 31, 2022 |  |  | 435 |  |  |  | $19.37 | - | $74.92 |  |  | $ | 35.60 |  |  | $ | 12,784 |  |  | $ | 6.02 |  |  |  | 5.1 |
Vested and exercisable |  |  | 307 |  |  |  | $19.37 | - | $50.71 |  |  | $ | 31.81 |  |  | $ | 10,181 |  |  | $ | 5.06 |  |  |  | 4.2 |
Unvested |  |  | 128 |  |  |  | 35.90 | - | 74.92 |  |  |  | 44.69 |  |  |  | 2,603 |  |  |  | 8.32 |  |  |  | 5.9 |
Outstanding, December 31, 2022 |  |  | 435 |  |  |  | $19.37 | - | $74.92 |  |  | $ | 35.60 |  |  | $ | 12,784 |  |  | $ | 6.02 |  |  |  | 5.1 |
Vested in the current year |  |  | 54 |  |  |  | $15.24 | - | $50.71 |  |  | $ | 39.36 |  |  | $ | 1,384 |  |  | $ | 6.50 |  |  |  |  |
Schedule of Share-based Compensation, Stock Options and Stock Appreciation Rights, Award Expiration Period [Table Text Block] |
(in thousands, except per share data) |  |  |  |  |  |  |  |  |
Expiration Year |  | SARs Outstanding |  |  | SARs Exercisable |  |  | Weighted Average Exercise Price |
2023 |  |  | - |  |  |  | - |  |  | $ | - |
2024 |  |  | 27 |  |  |  | 27 |  |  |  | 19.38 |
2025 |  |  | 39 |  |  |  | 39 |  |  |  | 23.02 |
2026 |  |  | 76 |  |  |  | 76 |  |  |  | 25.76 |
2027 |  |  | 40 |  |  |  | 40 |  |  |  | 40.00 |
2028 |  |  | 95 |  |  |  | 76 |  |  |  | 37.84 |
2029 |  |  | 47 |  |  |  | 26 |  |  |  | 37.06 |
2030 |  |  | 46 |  |  |  | 17 |  |  |  | 37.30 |
2031 |  |  | 31 |  |  |  | 6 |  |  |  | 50.48 |
2032 |  |  | 34 |  |  |  | — |  |  |  | 55.45 |
|  |  | 435 |  |  |  | 307 |  |  | $ | 35.60 |
Schedule of Nonvested Share Activity [Table Text Block] |
|  |  |  |  |  | Weighted |
|  |  |  |  |  | average cost |
(in thousands, except per share data) |  | RSAs |  |  | at grant date |
Unvested at January 1, 2020 |  |  | 108 |  |  | $ | 34.31 |
Shares awarded |  |  | 36 |  |  |  | 39.30 |
Restrictions lapsed and shares vested |  |  | (41 | ) |  |  | 32.38 |
Shares forfeited |  |  | (4 | ) |  |  | 36.63 |
Unvested at December 31, 2020 |  |  | 99 |  |  | $ | 36.85 |
Unvested at January 1, 2021 |  |  | 99 |  |  | $ | 36.85 |
Shares awarded |  |  | 39 |  |  |  | 46.90 |
Restrictions lapsed and shares vested |  |  | (34 | ) |  |  | 35.48 |
Shares forfeited |  |  | (5 | ) |  |  | 40.81 |
Unvested at December 31, 2021 |  |  | 99 |  |  | $ | 41.07 |
Unvested at January 1, 2022 |  |  | 99 |  |  | $ | 41.07 |
Shares awarded |  |  | 35 |  |  |  | 58.47 |
Restrictions lapsed and shares vested |  |  | (32 | ) |  |  | 40.39 |
Shares forfeited |  |  | (6 | ) |  |  | 47.49 |
Unvested at December 31, 2022 |  |  | 96 |  |  | $ | 47.26 |
Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] |
Grant Year |  | Vesting Period in Years |  |  | Fair Value |  |  | Shares Expected to be Awarded |
2020 |  |  | 3 |  |  | $ | 32.27 |  |  |  | 65,111 |
2021 |  |  | 3 |  |  |  | 44.44 |  |  |  | 47,280 |
2022 |  |  | 3 |  |  |  | 48.48 |  |  |  | 51,929 |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares to be Issued Upon Exercise and Remaining Shares Available for Future Issuance [Table Text Block] |
|  | Number of |  |  |  |  |  |  | Shares |
|  | shares to be |  |  | Weighted |  |  | available for |
|  | issued upon |  |  | average |  |  | future |
Plan category (in thousands) |  | exercising/vesting |  |  | exercise price |  |  | issuance (a) |
Equity compensation plans approved by security holders: |  |  |  |  |  |  |  |  |  |  |  |
Stock Appreciation Rights |  | (b) |  |  | (b) |  |  |  | 282 |
Restricted Stock Awards |  |  | 96 |  |  |  | N/A |  |  | (a) |
Restricted Stock Units |  |  | 5 |  |  |  | N/A |  |  | (a) |
Performance Stock Units |  | (c) |  |  |  | N/A |  |  | (a) |
Total shares |  |  | 101 |  |  |  |  |  |  |  | 282 |

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- Definition Tabular disclosure of the significant assumptions used during the period to estimate the fair value of stock-based compensation awards, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References No definition available. + Details
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