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Note 9 - Long-term Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Mar. 31, 2021	Nov. 30, 2018
Principal	$ 120,000	$ 175,000
Unamortized debt issuance costs	853	1,415
Six Point One Eight Percent Fixed To Floating Rate Subordinated Debentures Due December First Two Thousands Twenty Eight [Member]
Principal	0	55,000		$ 55,000
Unamortized debt issuance costs	0	180
Four Percent Fixed To Floating Rate Subordinated Debentures Due April First Two Thousand Thirty One [Member]
Principal	120,000	120,000	$ 120,000
Unamortized debt issuance costs	$ 853	$ 1,235

X

- Definition

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

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X

- Definition

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

+ References

No definition available.

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