NOTE 2 - INVESTMENT SECURITIES - Summary of the fair value of investment securities pledged (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025	Aug. 31, 2025
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged securities held to maturity, at amortized cost	$ 1,029,597	$ 948,676
Assets pledged as collateral
Financial Instruments Owned and Pledged as Collateral [Line Items]
Security Owned and Pledged as Collateral, Fair Value	295,845	354,550
Pledged securities held to maturity, at amortized cost	167,936	176,632	$ 200,300
Assets pledged as collateral | Derivatives
Financial Instruments Owned and Pledged as Collateral [Line Items]
Security Owned and Pledged as Collateral, Fair Value	153,694	189,898
Assets pledged as collateral | Public deposits
Financial Instruments Owned and Pledged as Collateral [Line Items]
Security Owned and Pledged as Collateral, Fair Value	2,779	3,323
Assets pledged as collateral | Other borrowings
Financial Instruments Owned and Pledged as Collateral [Line Items]
Security Owned and Pledged as Collateral, Fair Value	139,372	161,329
Assets pledged as collateral | U.S. govt. sponsored agency securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Security Owned and Pledged as Collateral, Fair Value	11,984	12,606
Assets pledged as collateral | U.S. govt. sponsored agency securities | Derivatives
Financial Instruments Owned and Pledged as Collateral [Line Items]
Security Owned and Pledged as Collateral, Fair Value	10,861	11,268
Assets pledged as collateral | U.S. govt. sponsored agency securities | Public deposits
Financial Instruments Owned and Pledged as Collateral [Line Items]
Security Owned and Pledged as Collateral, Fair Value	1,123	1,338
Assets pledged as collateral | Residential mortgage-backed and related securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Security Owned and Pledged as Collateral, Fair Value	20,712	38,550
Assets pledged as collateral | Residential mortgage-backed and related securities | Derivatives
Financial Instruments Owned and Pledged as Collateral [Line Items]
Security Owned and Pledged as Collateral, Fair Value	19,056	36,565
Assets pledged as collateral | Residential mortgage-backed and related securities | Public deposits
Financial Instruments Owned and Pledged as Collateral [Line Items]
Security Owned and Pledged as Collateral, Fair Value	1,656	1,985
Assets pledged as collateral | Municipal securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Security Owned and Pledged as Collateral, Fair Value	263,149	303,394
Assets pledged as collateral | Municipal securities | Derivatives
Financial Instruments Owned and Pledged as Collateral [Line Items]
Security Owned and Pledged as Collateral, Fair Value	123,777	142,065
Assets pledged as collateral | Municipal securities | Other borrowings
Financial Instruments Owned and Pledged as Collateral [Line Items]
Security Owned and Pledged as Collateral, Fair Value	$ 139,372	$ 161,329