FAIR VALUE OF FINANCIAL ASSETS AND FINANCIAL LIABILITIES (Level 3 Assets and Liabilities) (Details) - Mortgage revenue bonds - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Changes in Level 3 assets and liabilities measured at fair value on a recurring basis
Aggregate fair value / Balance at the beginning of the period	$ 6,716	$ 6,847
Principal payments received	(88)	(57)
Unrealized net gain (loss) included in other comprehensive income	(36)	54
Aggregate fair value / Balance at the end of the period	6,592	6,844
States and political subdivisions
Changes in Level 3 assets and liabilities measured at fair value on a recurring basis
Aggregate fair value / Balance at the beginning of the period	6,048	6,165
Principal payments received	(82)	(51)
Unrealized net gain (loss) included in other comprehensive income	(38)	48
Aggregate fair value / Balance at the end of the period	5,928	6,162
Residential - Non-government agencies
Changes in Level 3 assets and liabilities measured at fair value on a recurring basis
Aggregate fair value / Balance at the beginning of the period	668	682
Principal payments received	(6)	(6)
Unrealized net gain (loss) included in other comprehensive income	2	6
Aggregate fair value / Balance at the end of the period	$ 664	$ 682