NOTE 2 - INVESTMENT SECURITIES - Summary of the fair value of investment securities pledged (Details) - USD ($) $ in Thousands	Jun. 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	$ 991,452	$ 948,676
Assets pledged as collateral
Financial Instruments Owned and Pledged as Collateral [Line Items]
Security Owned and Pledged as Collateral, Fair Value	341,491	354,550
Pledged securities held to maturity, at amortized cost	168,156	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	199,927	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	3,049	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	138,515	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	12,463	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	11,198	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	1,265	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	47,345	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	45,561	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	1,784	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	281,683	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	143,168	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	$ 138,515	$ 161,329