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Note 7 - Fair Value Measurements and Fair Value of Financial Instruments (Tables) | 6 Months Ended
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Jun. 30, 2025
Notes Tables |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] |
|  |  |  |  |  | June 30, 2025 |
|  |  |  |  |  | Fair Value Measurements at Reporting Date Using |
|  | Total Fair Value |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
(dollars in thousands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Recurring fair value measurements: Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Federal agency obligations |  | $ | 359,417 |  |  | $ | - |  |  | $ | 359,417 |  |  | $ | - |
Residential mortgage pass-through securities |  |  | 628,139 |  |  |  | - |  |  |  | 628,139 |  |  |  | - |
Commercial mortgage pass-through securities |  |  | 26,572 |  |  |  | - |  |  |  | 26,572 |  |  |  | - |
Obligations of U.S. states and political subdivisions |  |  | 207,126 |  |  |  | - |  |  |  | 200,547 |  |  |  | 6,579 |
Corporate bonds and notes |  |  | 4,995 |  |  |  | - |  |  |  | 4,995 |  |  |  | - |
Asset-backed securities |  |  | 823 |  |  |  | - |  |  |  | 823 |  |  |  | - |
Other securities |  |  | 128 |  |  |  | 128 |  |  |  | - |  |  |  | - |
Total available-for-sale |  |  | 1,227,200 |  |  |  | 128 |  |  |  | 1,220,493 |  |  |  | 6,579 |
Equity securities |  |  | 19,707 |  |  |  | 9,920 |  |  |  | 9,787 |  |  |  | - |
Derivatives |  |  | 23,900 |  |  |  | - |  |  |  | 23,900 |  |  |  | - |
Total assets |  | $ | 1,270,807 |  |  | $ | 10,048 |  |  | $ | 1,254,180 |  |  | $ | 6,579 |
|  |  |  |  |  | December 31, 2024 |
|  |  |  |  |  | Fair Value Measurements at Reporting Date Using |
|  | Total Fair Value |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
(dollars in thousands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Recurring fair value measurements: Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Federal agency obligations |  | $ | 84,670 |  |  | $ | - |  |  | $ | 84,670 |  |  | $ | - |
Residential mortgage pass- through securities |  |  | 378,838 |  |  |  | - |  |  |  | 378,838 |  |  |  | - |
Commercial mortgage pass-through securities |  |  | 20,892 |  |  |  | - |  |  |  | 20,892 |  |  |  | - |
Obligations of U.S. states and political subdivisions |  |  | 122,404 |  |  |  | - |  |  |  | 115,878 |  |  |  | 6,526 |
Corporate bonds and notes |  |  | 4,987 |  |  |  | - |  |  |  | 4,987 |  |  |  | - |
Asset-backed securities |  |  | 885 |  |  |  | - |  |  |  | 885 |  |  |  | - |
Other securities |  |  | 171 |  |  |  | 171 |  |  |  | - |  |  |  | - |
Total available-for-sale |  | $ | 612,847 |  |  | $ | 171 |  |  | $ | 606,150 |  |  | $ | 6,526 |
Equity securities |  |  | 20,092 |  |  |  | 9,739 |  |  |  | 10,353 |  |  |  | - |
Derivatives |  |  | 37,398 |  |  |  | - |  |  |  | 37,398 |  |  |  | - |
Total assets |  | $ | 670,337 |  |  | $ | 9,910 |  |  | $ | 653,901 |  |  | $ | 6,526 |
Fair Value Measurements, Nonrecurring [Table Text Block] |
|  |  |  |  |  | Fair Value Measurements at Reporting Date Using |
Assets measured at fair value on a nonrecurring basis: |  | June 30, 2025 |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
Collateral dependent loans: |  | (dollars in thousands) |
Commercial |  | $ | 549 |  |  | $ | - |  |  | $ | - |  |  | $ | 549 |
Commercial real estate |  |  | 633 |  |  |  | - |  |  |  | - |  |  |  | 633 |
|  |  |  |  |  | Fair Value Measurements at Reporting Date Using |
Assets measured at fair value on a nonrecurring basis: |  | December 31, 2024 |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
Collateral dependent loans: |  | (dollars in thousands) |
Commercial |  | $ | 726 |  |  | $ | - |  |  | $ | - |  |  | $ | 726 |
Commercial real estate |  |  | 2,913 |  |  |  | - |  |  |  | - |  |  |  | 2,913 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] |
|  | Obligations of U.S. states and political subdivisions |
|  | (dollars in thousands) |
Beginning balance, January 1, 2025 |  | $ | 6,526 |
Principal paydowns |  |  | (156 | )
Change in unrealized gain (loss) |  |  | 209 |
Ending balance, June 30, 2025 |  | $ | 6,579 |
|  | Obligations of U.S. states and political subdivisions |
|  | (dollars in thousands) |
Beginning balance, January 1, 2024 |  | $ | 7,122 |
Principal paydowns |  |  | (304 | )
Changes in unrealized loss |  |  | (292 | )
Ending balance, December 31, 2024 |  | $ | 6,526 |
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] |
June 30, 2025 |  |  |  |  |  |  |  |  |  |  |
|  | Fair Value |  | Valuation Techniques |  | Unobservable Input |  | Rate |
Securities available-for-sale: |  |  |  |  | (dollars in thousands) |  |  |  |  |  |
Obligations of U.S. states and political subdivisions |  | $ | 6,579 |  | Discounted cash flows |  | Discount rate |  |  | 4.7 | %
December 31, 2024 |  |  |  |  |  |  |  |  |  |  |
|  | Fair Value |  | Valuation Techniques |  | Unobservable Input |  | Rate |
Securities available-for-sale: |  |  |  |  | (dollars in thousands) |  |  |  |  |  |
Obligations of U.S. states and political subdivisions |  | $ | 6,526 |  | Discounted cash flows |  | Discount rate |  |  | 5.0 | %
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block] |
June 30, 2025 |  |  |  |  |  |  |  |  |  |  |
(dollars in thousands) |  | Fair Value |  |  | Valuation Techniques | Unobservable Input |  | Range (weighted average) |
Commercial loans |  | $ | 549 |  |  | Appraisals of collateral value | Adjustment for comparable sales |  | -10% to +5% (-4.3%) |
Commercial real estate loans |  |  | 633 |  |  | Appraisals of collateral value | Adjustment for comparable sales |  | -10% to +5% (-2.17%) |
December 31, 2024 |  |  |  |  |  |  |  |  |  |  |
(dollars in thousands) |  | Fair Value |  |  | Valuation Techniques | Unobservable Input |  | Range (weighted average) |
Commercial loans |  | $ | 726 |  |  | Appraisals of collateral value | Adjustment for comparable sales |  |  | -10% to +5% (-4.3%) |
Commercial real estate loans |  |  | 2,913 |  |  | Appraisals of collateral value | Adjustment for comparable sales |  | -40% to +0% (-14.3%) |
Fair Value, by Balance Sheet Grouping [Table Text Block] |
|  |  |  |  |  |  |  |  |  | Fair Value Measurements |
|  | Carrying Amount |  |  | Fair Value |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
|  | (dollars in thousands) |
June 30, 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and due from banks |  | $ | 596,533 |  |  | $ | 596,533 |  |  | $ | 596,533 |  |  | $ | - |  |  | $ | - |
Securities available-for-sale |  |  | 1,227,200 |  |  |  | 1,227,200 |  |  |  | 128 |  |  |  | 1,220,493 |  |  |  | 6,579 |
Restricted investments in bank stocks |  |  | 49,248 |  |  |  | n/a |  |  |  | n/a |  |  |  | n/a |  |  |  | n/a |
Equity securities |  |  | 19,707 |  |  |  | 19,707 |  |  |  | 9,920 |  |  |  | 9,787 |  |  |  | - |
Net loans |  |  | 11,008,287 |  |  |  | 10,834,868 |  |  |  | - |  |  |  | - |  |  |  | 10,834,868 |
Derivatives - interest rate contracts |  |  | 23,900 |  |  |  | 23,900 |  |  |  | - |  |  |  | 23,900 |  |  |  | - |
Accrued interest receivable |  |  | 60,405 |  |  |  | 60,405 |  |  |  | - |  |  |  | 5,454 |  |  |  | 54,951 |
|  |  | . |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noninterest-bearing deposits |  |  | 2,424,529 |  |  |  | 2,424,529 |  |  |  | 2,424,529 |  |  |  | - |  |  |  | - |
Interest-bearing deposits |  |  | 8,853,958 |  |  |  | 8,840,224 |  |  |  | 5,788,943 |  |  |  | 3,051,281 |  |  |  | - |
Borrowings |  |  | 783,859 |  |  |  | 783,562 |  |  |  | - |  |  |  | 783,562 |  |  |  | - |
Subordinated debentures |  |  | 276,500 |  |  |  | 276,327 |  |  |  | - |  |  |  | 276,327 |  |  |  | - |
Accrued interest payable |  |  | 15,936 |  |  |  | 15,936 |  |  |  | - |  |  |  | 15,936 |  |  |  | - |
December 31, 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and due from banks |  | $ | 356,488 |  |  | $ | 356,488 |  |  | $ | 356,488 |  |  | $ | - |  |  | $ | - |
Investment securities available-for-sale |  |  | 612,847 |  |  |  | 612,847 |  |  |  | 171 |  |  |  | 606,150 |  |  |  | 6,526 |
Restricted investment in bank stocks |  |  | 40,449 |  |  |  | n/a |  |  |  | n/a |  |  |  | n/a |  |  |  | n/a |
Equity securities |  |  | 20,092 |  |  |  | 20,092 |  |  |  | 9,739 |  |  |  | 10,353 |  |  |  | - |
Net loans |  |  | 8,192,125 |  |  |  | 7,980,038 |  |  |  | - |  |  |  | - |  |  |  | 7,980,038 |
Derivatives - interest rate contracts |  |  | 37,398 |  |  |  | 37,398 |  |  |  | - |  |  |  | 37,398 |  |  |  | - |
Accrued interest receivable |  |  | 45,498 |  |  |  | 45,498 |  |  |  | - |  |  |  | 5,444 |  |  |  | 40,054 |
Financial liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noninterest-bearing deposits |  |  | 1,422,044 |  |  |  | 1,422,044 |  |  |  | 1,422,044 |  |  |  | - |  |  |  | - |
Interest-bearing deposits |  |  | 6,398,070 |  |  |  | 6,387,896 |  |  |  | 3,840,870 |  |  |  | 2,547,026 |  |  |  | - |
Borrowings |  |  | 688,064 |  |  |  | 687,273 |  |  |  | - |  |  |  | 687,273 |  |  |  | - |
Subordinated debentures |  |  | 79,944 |  |  |  | 77,968 |  |  |  | - |  |  |  | 77,968 |  |  |  | - |
Accrued interest payable |  |  | 9,320 |  |  |  | 9,320 |  |  |  | - |  |  |  | 9,320 |  |  |  | - |

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- Definition Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 103 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-103 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 101 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-101 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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