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Note 14 - Disclosure of Financial Instruments Not Reported at Fair Value - Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Cash and cash equivalents | $ 756,289 | $ 291,020
Accrued interest receivable | 28,512 | 27,697
Non-interest bearing | 1,589,159 | 1,456,138
Time deposits | 1,719,268 | 1,237,788
Accrued interest payable | 1,885 | 1,912
Reported Value Measurement [Member] |  |
Cash and cash equivalents | 756,289 | 291,020
HTM debt securities | 203,119 | 370,171
Federal Home Loan Bank stock | 20,717 | 21,603
Loans, net | 6,837,296 | 6,433,459
Accrued interest receivable | 28,512 | 27,697
Non-interest bearing | 1,589,159 | 1,456,138
Transaction deposits | 4,335,544 | 4,472,475
Time deposits | 1,719,269 | 1,237,788
Securities sold under agreement to repurchase | 73,149 | 162,967
Federal funds purchased | 6,729 | 6,525
Subordinated debentures | 26,806 | 26,806
FHLB advances | 300,000 | 300,000
Accrued interest payable | 1,885 | 1,912
Estimate of Fair Value Measurement [Member] |  |
Cash and cash equivalents | 756,289 | 291,020
HTM debt securities | 183,811 | 341,357
Federal Home Loan Bank stock | 20,717 | 21,603
Loans, net | 6,721,200 | 6,256,752
Accrued interest receivable | 28,512 | 27,697
Non-interest bearing | 1,589,159 | 1,456,138
Transaction deposits | 4,335,544 | 4,472,475
Time deposits | 1,723,362 | 1,236,463
Securities sold under agreement to repurchase | 73,149 | 162,967
Federal funds purchased | 6,729 | 6,525
Subordinated debentures | 26,528 | 26,346
FHLB advances | 296,892 | 294,848
Accrued interest payable | 1,885 | 1,912
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Cash and cash equivalents | 756,289 | 291,020
HTM debt securities | 1,965 | 153,108
Federal Home Loan Bank stock | 0 | 0
Loans, net | 0 | 0
Accrued interest receivable | 28,512 | 27,697
Non-interest bearing | 1,589,159 | 1,456,138
Transaction deposits | 0 | 0
Time deposits | 0 | 0
Securities sold under agreement to repurchase | 0 | 0
Federal funds purchased | 0 | 0
Subordinated debentures | 0 | 0
FHLB advances | 0 | 0
Accrued interest payable | 1,885 | 1,912
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Cash and cash equivalents | 0 | 0
HTM debt securities | 181,846 | 188,249
Federal Home Loan Bank stock | 20,717 | 21,603
Loans, net | 0 | 0
Accrued interest receivable | 0 | 0
Non-interest bearing | 0 | 0
Transaction deposits | 4,335,544 | 4,472,475
Time deposits | 1,723,362 | 1,236,463
Securities sold under agreement to repurchase | 73,149 | 162,967
Federal funds purchased | 6,729 | 6,525
Subordinated debentures | 26,528 | 26,346
FHLB advances | 296,892 | 294,848
Accrued interest payable | 0 | 0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Cash and cash equivalents | 0 | 0
HTM debt securities | 0 | 0
Federal Home Loan Bank stock | 0 | 0
Loans, net | 6,721,200 | 6,256,752
Accrued interest receivable | 0 | 0
Non-interest bearing | 0 | 0
Transaction deposits | 0 | 0
Time deposits | 0 | 0
Securities sold under agreement to repurchase | 0 | 0
Federal funds purchased | 0 | 0
Subordinated debentures | 0 | 0
FHLB advances | 0 | 0
Accrued interest payable | $ 0 | $ 0

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- Definition Represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount shown on the entity's books for investments made in Federal Home Loan Bank stock and other securities. + References No definition available. + Details
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- Definition The sum of cash and cash equivalents plus Federal Funds Sold. Cash and cash equivalents consist of short term, highly liquid investments that are readily convertible to known amounts of cash and are so near their maturity that they present negligible risk of changes in value due to changes in interest rates -- usually with an original maturity less than 90 days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(3)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 + Details
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- Definition Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name Accounting Standards Codification -Section 55 -Paragraph 10 -SubTopic 10 -Topic 825 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482881/825-10-55-10 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-28 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-10 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482881/825-10-55-12 + Details
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