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NOTE 2 - INVESTMENT SECURITIES (Details) $ in Thousands	3 Months Ended		6 Months Ended
NOTE 2 - INVESTMENT SECURITIES (Details) $ in Thousands	Jun. 30, 2026 USD ($) security state issuer	Jun. 30, 2025 USD ($) security	Jun. 30, 2026 USD ($) state security issuer item	Jun. 30, 2025 USD ($) security	Dec. 31, 2025 USD ($) state issuer
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Number of securities \| security	683		683
Aggregate losses of securities (as a percent)	14.30%		14.30%
Allowance for credit losses for available for sale securities	$ 0	$ 0	$ 0	$ 0
Available-for-sale, unrealized loss positions, qualitative disclosure, number of positions \| security	518		518
Available-for-sale, unrealized loss positions, qualitative disclosure, number of positions, greater than or equal to one year \| security	438		438
Securities trading, at fair value	$ 115,967		$ 115,967		$ 83,857
Recognized trading net gain (loss)			45	77
Transfer of debt securities held to maturity	$ 0	$ 0	$ 0	$ 0
Number of security sold \| security	0	0	0	0
Number of charters owning municipal securities \| item			4
General Obligation Bonds
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Number of issuers \| issuer	80		80		80
Other investments	$ 106,500		$ 106,500		$ 106,800
Number of states holding investments \| state	18		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	9		9		9
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		$ 5,000
Revenue Bonds
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Number of issuers \| issuer	160		160		164
Other investments	$ 898,600		$ 898,600		$ 879,600
Number of states holding investments \| state	31		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		14		14
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		$ 5,000