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Note 9 - Long-term Debt (Details Textual) - USD ($) $ in Millions		1 Months Ended
	Dec. 01, 2023	Mar. 31, 2021	Nov. 30, 2018	Dec. 31, 2024	Dec. 31, 2023
Debt Instrument, Face Amount				$ 120	$ 120
Six Point One Eight Percent Fixed To Floating Rate Subordinated Debentures Due December First Two Thousands Twenty Eight [Member]
Debt Instrument, Face Amount			$ 55
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate			6.18%
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed	100.00%
Six Point One Eight Percent Fixed To Floating Rate Subordinated Debentures Due December First Two Thousands Twenty Eight [Member] | London Interbank Offered Rate [Member]
Debt Instrument, Basis Spread on Variable Rate			3.15%
Four Percent Fixed To Floating Rate Subordinated Debentures Due April First Two Thousand Thirty One [Member]
Debt Instrument, Face Amount		$ 120
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		4.00%
Four Percent Fixed To Floating Rate Subordinated Debentures Due April First Two Thousand Thirty One [Member] | Secured Overnight Financing Rate (SOFR) [Member]
Debt Instrument, Basis Spread on Variable Rate		3.29%

X

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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-Topic 835
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- Definition

Percentage of principal amount of debt redeemed.

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- Definition

The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

+ References

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