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Note 19 - Stock-based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2025
Notes Tables |
Schedule of Share-based Compensation Arrangement by Share-based Payment Award Fair Value Assumptions and Methodology [Table Text Block] |
Assumptions |  | 2025 |  |  | 2024 |
Dividend yield |  |  | 2.26 | % |  |  | 2.29 | %
Expected volatility |  |  | 29.29 | % |  |  | 28.43 | %
Risk free interest rate |  |  | 4.42 | % |  |  | 4.16 | %
Expected life (in years) |  |  | 7.8 |  |  |  | 7.1 |
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] |
|  | Three months ended September 30, 2025 |
(in thousands) |  | Stock Appreciation Rights |  |  | Restricted Stock Awards |  |  | Restricted Stock Units |  |  | Performance Stock Units |  |  | Total |
Expense |  | $ | 113 |  |  | $ | 494 |  |  | $ | 122 |  |  | $ | 384 |  |  | $ | 1,113 |
Deferred tax benefit |  |  | (24 | ) |  |  | (104 | ) |  |  | (26 | ) |  |  | (80 | ) |  |  | (234 | )
Total net expense |  | $ | 89 |  |  | $ | 390 |  |  | $ | 96 |  |  | $ | 304 |  |  | $ | 879 |
|  | Three months ended September 30, 2024 |
(in thousands) |  | Stock Appreciation Rights |  |  | Restricted Stock Awards |  |  | Restricted Stock Units |  |  | Performance Stock Units |  |  | Total |
Expense |  | $ | 72 |  |  | $ | 420 |  |  | $ | 125 |  |  | $ | 305 |  |  | $ | 922 |
Deferred tax benefit |  |  | (15 | ) |  |  | (88 | ) |  |  | (27 | ) |  |  | (64 | ) |  |  | (194 | )
Total net expense |  | $ | 57 |  |  | $ | 332 |  |  | $ | 98 |  |  | $ | 241 |  |  | $ | 728 |
|  | Nine months ended September 30, 2025 |
(in thousands) |  | Stock Appreciation Rights |  |  | Restricted Stock Awards |  |  | Restricted Stock Units |  |  | Performance Stock Units |  |  | Total |
Expense |  | $ | 329 |  |  | $ | 1,432 |  |  | $ | 388 |  |  | $ | 1,238 |  |  | $ | 3,387 |
Deferred tax benefit |  |  | (69 | ) |  |  | (301 | ) |  |  | (82 | ) |  |  | (260 | ) |  |  | (712 | )
Total net expense |  | $ | 260 |  |  | $ | 1,131 |  |  | $ | 306 |  |  | $ | 978 |  |  | $ | 2,675 |
|  | Nine months ended September 30, 2024 |
(in thousands) |  | Stock Appreciation Rights |  |  | Restricted Stock Awards |  |  | Restricted Stock Units |  |  | Performance Stock Units |  |  | Total |
Expense |  | $ | 212 |  |  | $ | 1,258 |  |  | $ | 374 |  |  | $ | 1,028 |  |  | $ | 2,872 |
Deferred tax benefit |  |  | (45 | ) |  |  | (264 | ) |  |  | (79 | ) |  |  | (216 | ) |  |  | (604 | )
Total net expense |  | $ | 167 |  |  | $ | 994 |  |  | $ | 295 |  |  | $ | 812 |  |  | $ | 2,268 |
Share-Based Payment Arrangement, Nonvested Award, Cost [Table Text Block] |
|  | Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(in thousands) |  | Appreciation |  |  | Restricted |  |  | Restricted |  |  | Performance |  |  |  |  |
Year ended |  | Rights |  |  | Stock Awards |  |  | Stock Units |  |  | Stock Units |  |  | Total |
Remainder of 2025 |  | $ | 113 |  |  | $ | 486 |  |  | $ | 122 |  |  | $ | 302 |  |  | $ | 1,023 |
2026 |  |  | 406 |  |  |  | 1,683 |  |  |  | 1 |  |  |  | 1,209 |  |  |  | 3,299 |
2027 |  |  | 336 |  |  |  | 1,385 |  |  |  | — |  |  |  | 1,209 |  |  |  | 2,930 |
2028 |  |  | 246 |  |  |  | 992 |  |  |  | — |  |  |  | — |  |  |  | 1,238 |
2029 |  |  | 131 |  |  |  | 619 |  |  |  | — |  |  |  | — |  |  |  | 750 |
2030 |  |  | 13 |  |  |  | 69 |  |  |  | — |  |  |  | — |  |  |  | 82 |
Total estimated future expense |  | $ | 1,245 |  |  | $ | 5,234 |  |  | $ | 123 |  |  | $ | 2,720 |  |  | $ | 9,322 |
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 life data) |  | SARs |  |  | price |  |  | price |  |  | value(1) |  |  | value |  |  | life (in years) |
Outstanding, January 1, 2024 |  |  | 440 |  |  | $19.44 | - | $74.92 |  |  | $ | 38.11 |  |  | $ | 6,297 |  |  | $ | 6.86 |  |  |  | 4.7 |
Granted |  |  | 42 |  |  | 47.95 | - | 54.92 |  |  |  | 49.20 |  |  |  | — |  |  |  | 13.75 |  |  |  |  |
Exercised |  |  | (142 | ) |  | 22.96 | - | 40.00 |  |  |  | 28.74 |  |  |  | 5,617 |  |  |  | 4.51 |  |  |  |  |
Forfeited |  |  | — |  |  |  | — |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  |  |
Outstanding, December 31, 2024 |  |  | 340 |  |  | $25.76 | - | $74.92 |  |  | $ | 43.41 |  |  | $ | 9,774 |  |  | $ | 8.69 |  |  |  | 5.3 |
Outstanding, January 1, 2025 |  |  | 340 |  |  | $25.76 | - | $74.92 |  |  | $ | 43.41 |  |  | $ | 9,774 |  |  | $ | 8.69 |  |  |  | 5.3 |
Granted |  |  | 25 |  |  | 75.21 | - | 75.21 |  |  |  | 72.21 |  |  |  | — |  |  |  | 23.75 |  |  |  |  |
Exercised |  |  | (28 | ) |  | 25.76 | - | 40.00 |  |  |  | 29.67 |  |  |  | 1,332 |  |  |  | 4.32 |  |  |  |  |
Forfeited |  |  | — |  |  |  | — |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  |  |
Outstanding, September 30, 2025 |  |  | 337 |  |  | $25.76 | - | $75.21 |  |  | $ | 46.92 |  |  | $ | 7,923 |  |  | $ | 10.18 |  |  |  | 5.2 |
Vested and exercisable |  |  | 245 |  |  | $25.76 | - | $60.76 |  |  | $ | 42.28 |  |  | $ | 6,799 |  |  | $ | 7.77 |  |  |  | 4.2 |
Unvested |  |  | 92 |  |  | 47.17 | - | 75.21 |  |  |  | 59.26 |  |  |  | 1,124 |  |  |  | 16.58 |  |  |  | 3.4 |
Outstanding, September 30, 2025 |  |  | 337 |  |  | $25.76 | - | $75.21 |  |  | $ | 46.92 |  |  | $ | 7,923 |  |  | $ | 10.18 |  |  |  | 5.2 |
Vested in the current year |  |  | 33 |  |  | $36.65 | - | $60.76 |  |  | $ | 49.24 |  |  | $ | 689 |  |  | $ | 11.24 |  |  |  |  |
Schedule of Nonvested Share Activity [Table Text Block] |
|  |  |  |  |  | Grant date |
|  |  |  |  |  | weighted |
(in thousands, except per share data) |  | RSAs |  |  | average cost |
Unvested at January 1, 2024 |  |  | 98 |  |  | $ | 54.23 |
Shares awarded |  |  | 46 |  |  |  | 52.06 |
Restrictions lapsed and shares released |  |  | (33 | ) |  |  | 49.49 |
Shares cancelled |  |  | (9 | ) |  |  | 53.10 |
Unvested at December 31, 2024 |  |  | 102 |  |  | $ | 54.92 |
Unvested at January 1, 2025 |  |  | 102 |  |  | $ | 54.92 |
Shares awarded |  |  | 39 |  |  |  | 76.21 |
Restrictions lapsed and shares released |  |  | (32 | ) |  |  | 51.92 |
Shares cancelled |  |  | (5 | ) |  |  | 62.13 |
Unvested at September 30, 2025 |  |  | 104 |  |  | $ | 62.36 |
Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] |
|  | Vesting |  |  |  |  |  |  | Shares |
Grant |  | period |  |  | Fair |  |  | expected to |
year |  | in years |  |  | value |  |  | be awarded |
2023 |  |  | 3 |  |  |  | 54.33 |  |  |  | 18,762 |
2024 |  |  | 3 |  |  |  | 41.84 |  |  |  | 49,957 |
2025 |  |  | 3 |  |  |  | 67.61 |  |  |  | 53,254 |

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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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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for stock options and stock appreciation rights that were outstanding at the beginning and end of the year, exercisable at the end of the year, and the number of stock options and stock appreciation rights that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of cost not yet recognized and weighted-average period over which cost is expected to be recognized for nonvested award under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (i) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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