NOTE 2 - INVESTMENT SECURITIES (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2026 USD ($) security state issuer item	Mar. 31, 2025 USD ($) security	Dec. 31, 2025 USD ($) state issuer
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Number of securities | security	669
Aggregate losses of securities (as a percent)	13.90%
Allowance for credit losses for available for sale securities	$ 0	$ 0
Available-for-sale, unrealized loss positions, qualitative disclosure, number of positions | security	539
Available-for-sale, unrealized loss positions, qualitative disclosure, number of positions, greater than or equal to one year | security	463
Securities trading, at fair value	$ 82,728		$ 83,857
Recognized trading net gain (loss)	(852)	(809)
Transfer of debt securities held to maturity	$ 0	$ 0
Number of security sold | security	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
Other investments	$ 104,100		$ 106,800
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	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
Revenue Bonds
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Number of issuers | issuer	161		164
Other investments	$ 863,200		$ 879,600
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		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