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Note 9 - Fair Value Measurements (Tables) | 9 Months Ended
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Sep. 30, 2025
Notes Tables |
Fair Value, Assets Measured on Recurring Basis [Table Text Block] |
|  | At September 30, 2025 |
|  | Fair Value |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) (1) |
|  | (In thousands) |
Debt securities available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency residential MBS |  | $ | 192,490 |  |  | $ | - |  |  | $ | 192,490 |  |  | $ | - |
Agency commercial MBS |  |  | 397,164 |  |  |  | - |  |  |  | 397,164 |  |  |  | - |
Securities of U.S. Government sponsored entities |  |  | 305,192 |  |  |  | - |  |  |  | 305,192 |  |  |  | - |
Obligations of states and political subdivisions |  |  | 51,853 |  |  |  | - |  |  |  | 51,853 |  |  |  | - |
Corporate securities |  |  | 1,797,562 |  |  |  | - |  |  |  | 1,797,562 |  |  |  | - |
Collateralized loan obligations |  |  | 561,063 |  |  |  | - |  |  |  | 561,063 |  |  |  | - |
Total debt securities available for sale |  |  | 3,305,324 |  |  |  | - |  |  |  | 3,305,324 |  |  |  | - |
Equity securities held for trading |  |  | 436 |  |  |  | 436 |  |  |  | - |  |  |  | - |
Total securities measured at fair value |  | $ | 3,305,760 |  |  | $ | 436 |  |  | $ | 3,305,324 |  |  | $ | - |
|  | At December 31, 2024 |
|  | Fair Value |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) (1) |
|  | (In thousands) |
Debt securities available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency residential MBS |  | $ | 211,060 |  |  | $ | - |  |  | $ | 211,060 |  |  | $ | - |
Agency commercial MBS |  |  | 6,966 |  |  |  | - |  |  |  | 6,966 |  |  |  | - |
Securities of U.S. Government sponsored entities |  |  | 292,117 |  |  |  | - |  |  |  | 292,117 |  |  |  | - |
U.S. Treasury securities |  |  | 4,955 |  |  |  | 4,955 |  |  |  | - |  |  |  | - |
Obligations of states and political subdivisions |  |  | 62,186 |  |  |  | - |  |  |  | 62,186 |  |  |  | - |
Corporate securities |  |  | 1,835,937 |  |  |  | - |  |  |  | 1,835,937 |  |  |  | - |
Collateralized loan obligations |  |  | 982,589 |  |  |  | - |  |  |  | 982,589 |  |  |  | - |
Total debt securities available for sale |  | $ | 3,395,810 |  |  | $ | 4,955 |  |  | $ | 3,390,855 |  |  | $ | - |
Fair Value Measurements, Nonrecurring [Table Text Block] |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | For the Nine |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Months Ended |
|  | At September 30, 2025 |  |  | September 30, 2025 |
|  | Carrying Value |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total Losses |
|  | (In thousands) |
Loans: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial |  | $ | 728 |  |  | $ | - |  |  | $ | - |  |  | $ | 728 |  |  | $ | - |
Total assets measured at fair value on a nonrecurring basis |  | $ | 728 |  |  | $ | - |  |  | $ | - |  |  | $ | 728 |  |  | $ | - |
Fair Value, by Balance Sheet Grouping [Table Text Block] |
|  | At September 30, 2025 |
|  | Carrying Amount |  |  | Estimated Fair Value |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2 ) |  |  | Significant Unobservable Inputs (Level 3 ) |
Financial Assets: |  | (In thousands) |
Cash and due from banks |  | $ | 659,268 |  |  | $ | 659,268 |  |  | $ | 659,268 |  |  | $ | - |  |  | $ | - |
Debt securities held to maturity |  |  | 826,505 |  |  |  | 817,188 |  |  |  | - |  |  |  | 817,188 |  |  |  | - |
Loans |  |  | 729,720 |  |  |  | 730,365 |  |  |  | - |  |  |  | - |  |  |  | 730,365 |
Financial Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deposits |  | $ | 4,793,179 |  |  | $ | 4,788,614 |  |  | $ | - |  |  | $ | 4,721,941 |  |  | $ | 66,673 |
Securities sold under repurchase agreements |  |  | 133,651 |  |  |  | 133,651 |  |  |  | - |  |  |  | 133,651 |  |  |  | - |
|  | At December 31, 2024 |
|  | Carrying Amount |  |  | Estimated Fair Value |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2 ) |  |  | Significant Unobservable Inputs (Level 3 ) |
Financial Assets: |  | (In thousands) |
Cash and due from banks |  | $ | 601,494 |  |  | $ | 601,494 |  |  | $ | 601,494 |  |  | $ | - |  |  | $ | - |
Debt securities held to maturity |  |  | 844,634 |  |  |  | 807,838 |  |  |  | - |  |  |  | 807,838 |  |  |  | - |
Loans |  |  | 805,520 |  |  |  | 795,849 |  |  |  | - |  |  |  | - |  |  |  | 795,849 |
Financial Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deposits |  | $ | 5,011,850 |  |  | $ | 5,007,644 |  |  | $ | - |  |  | $ | 4,929,612 |  |  | $ | 78,032 |
Securities sold under repurchase agreements |  |  | 120,322 |  |  |  | 120,322 |  |  |  | - |  |  |  | 120,322 |  |  |  | - |

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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 assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 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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