Note 2 - Debt Securities (Details Textual) - USD ($) $ in Thousands |
3 Months Ended | ||
|---|---|---|---|
Sep. 30, 2021 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Debt Securities, Available-for-sale, Transfer to Held-to-maturity | $ 261,300 | ||
| Debt Securities, Available-for-sale, Transfer to Held-to-maturity, Accumulated Realized Gain (Loss) in Other Comprehensive Income | $ 5,600 | ||
| Debt Securities, Available-for-sale, Allowance for Credit Loss, Current | $ 0 | ||
| Debt Securities, Available-for-sale, Allowance for Credit Loss, Ending Balance | 0 | ||
| Pledged Financial Instruments, Not Separately Reported, Securities, Total | $ 481,300 | $ 477,600 |
| X | ||||||||||
- Definition Amount of available for sale debt securities transferred to held-to-maturity. No definition available.
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| X | ||||||||||
- Definition The amount of accumulated realized gain (loss) in other comprehensive income from transfer of available for sale debt securities transferred to held to maturity. No definition available.
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| X | ||||||||||
- Definition Amount of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Sum of the carrying amounts as of the date of the latest financial statement presented of securities which are owned but transferred to another party to serve as collateral to partially or fully secure a debt obligation, repurchase agreement or other current or potential obligation, and for which the transferee is not permitted to sell or re-pledge them to an unrelated party. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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