NOTE 2 - INVESTMENT SECURITIES (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026 USD ($) issuer security state	Sep. 30, 2025 USD ($) security	Sep. 30, 2026 USD ($) issuer security state item	Sep. 30, 2025 USD ($) security	Dec. 31, 2025 USD ($) state issuer
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Number of securities | security	688		688
Available-for-sale, unrealized loss positions, qualitative disclosure, number of positions | security	627		627
Aggregate losses of securities (as a percent)	13.60%		13.60%
Available-for-sale, unrealized loss positions, qualitative disclosure, number of positions, greater than or equal to one year | security	368		368
Allowance for credit losses for available for sale securities	$ 0	$ 0	$ 0	$ 0
Securities trading, at fair value	116,050		116,050		$ 83,857
Recognized trading net gain (loss)			397	530
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	81		81		80
Other investments	$ 94,600		$ 94,600		$ 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	159		159		164
Other investments	$ 939,700		$ 939,700		$ 942,300
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