Note 2 - Debt Securities (Details Textual) - USD ($) $ in Thousands |
3 Months Ended | ||
|---|---|---|---|
Sep. 30, 2021 |
Dec. 31, 2022 |
Dec. 31, 2021 |
|
| 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 | $ 0 | |
| Debt Securities, Available-for-Sale, Allowance for Credit Loss, Ending Balance | 0 | ||
| Asset Not Pledged as Collateral and Asset Pledged as Collateral without Right [Member] | |||
| Debt Securities, Total | $ 789,300 | $ 481,300 |
| 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, after allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), investment in debt security measured at amortized cost (held-to-maturity), and investment in debt security measured at fair value with change in fair value recognized in net income (trading). 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 | ||||||||||
- Details
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