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Note 10 - Borrowed Funds (Details Textual) - USD ($) $ in Thousands |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | ---
Mar. 28, 2019 | Nov. 23, 2014 | Mar. 13, 2014 | Nov. 23, 2004 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Securities Sold under Agreements to Repurchase, Total |  |  |  |  | $ 0 | $ 0 |
Advance from Federal Home Loan Bank, Total |  |  |  |  | 485,000 | 20,000 |
Threshold for Deferred Bonus |  |  |  | $ 225,000 |  |  |
Amount of Deferred Bonus Accrued in Other Liabilities |  |  | $ 300 | $ 610 |  |  |
Accrued Interest on Deferred Bonus | 5.72% | 5.06% | 5.02% | 7.00% |  |  |
Interest Expense, Other |  |  |  |  | 116 | 110 | $ 105
Accrued Bonuses |  |  |  |  | 2,300 | 2,100 |
Junior Subordinated Notes, Noncurrent |  |  |  |  | $ 119,100 | $ 119,100 |
Junior Subordinated Debt [Member] |  |  |  |  |  |  |
Debt Instrument, Term (Year) |  |  |  |  |  | 30 years |
Debt Instrument, Interest Rate, Effective Percentage |  |  |  |  | 4.01% | 2.38% |
Interest Expense, Debt, Total |  |  |  |  | $ 4,800 | $ 2,800 | $ 3,600
Mature in May 2023 [Member] |  |  |  |  |  |  |
Advance from Federal Home Loan Bank, Total |  |  |  |  | 300,000 | 20,000 |
Mature in September 2024 [Member] |  |  |  |  |  |  |
Advance from Federal Home Loan Bank, Total |  |  |  |  | 15,000 |  |
Ten-year Treasury Note [Member] |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 2.75% |  |  |  |  |
Debt Instrument, Term (Year) |  | 10 years |  |  |  |  |
Five-year Treasury Note [Member] |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 3.50% |  |  |  |  |  |
Debt Instrument, Term (Year) | 5 years |  |  |  |  |  |
Over-night Borrowings [Member] |  |  |  |  |  |  |
Advance from Federal Home Loan Bank, Total |  |  |  |  | $ 150,000 | 0 |
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate |  |  |  |  | 4.65% |  |
Non Overnight Borrowings [Member] |  |  |  |  |  |  |
Advance from Federal Home Loan Bank, Total |  |  |  |  | $ 335,000 | $ 20,000 |
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate |  |  |  |  | 4.54% | 2.89% |

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- Definition Carrying value as of the balance sheet date of obligations incurred and payable for incentive compensation awarded to employees and directors or earned by them based on the terms of one or more relevant arrangements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15(a)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 + Details
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- Definition Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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