The aggregate depreciation from amortized cost basis as a percent.

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The number of the company's that own the company's municipal securities.

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Number of issuers of debt securities.

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Number of securities.

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Represents the number of states investments are held in.

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- Definition

Percentage threshold of stockholders' equity which general obligation or revenue bonds market value of any single issuer does not exceed.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without an allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Amount, excluding accrued interest, of credit loss expense (reversal of expense) on investment in debt security measured at amortized cost (held-to-maturity) from change in methodology.

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Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in net income (trading).

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading).

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Note 2 - INVESTMENT SECURITIES (Details) $ in Thousands	3 Months Ended
Note 2 - INVESTMENT SECURITIES (Details) $ in Thousands	Mar. 31, 2024 USD ($) issuer security state item	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($) state issuer
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Number of securities \| security	651
Aggregate losses of securities (as a percent)	9.40%
Available-for-sale, unrealized loss positions, qualitative disclosure, number of positions \| security	527
Available-for-sale, unrealized loss positions, qualitative disclosure, number of positions, greater than or equal to one year \| security	484
Securities trading, at fair value	$ 22,258		$ 22,369
Recognized trading gain (loss)	$ 19
Number Of Charters Owning Municipal Securities \| item	4
General Obligation Bonds
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Other investments	$ 96,800		$ 99,400
Number of issuers \| issuer	79		82
Number of states holding investments \| state	18		18
General Obligation Bonds \| Aggregate Fair Value Exceeding 5 Million
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Number of states holding investments \| state	8		8
General Obligation Bonds \| Aggregate Fair Value Exceeding 5 Million \| Minimum
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Other investments	$ 5,000		$ 5,000
Revenue Bonds
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Other investments	$ 765,000		$ 750,800
Number of issuers \| issuer	165		169
Number of states holding investments \| state	31		31
Revenue Bonds \| Aggregate Fair Value Exceeding 5 Million
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Number of states holding investments \| state	14		15
Revenue Bonds \| Aggregate Fair Value Exceeding 5 Million \| Minimum
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Other investments	$ 5,000		$ 5,000
Revenue Bonds \| Aggregate Book Or Market Value Exceeded 5% of The Company Equity [Member]
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Number of issuers \| issuer	2		2
Percentage threshold	5.00%
Corporate securities
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Provision for credit loss expense	$ (445)	$ 989