FAIR VALUE OF FINANCIAL ASSETS AND FINANCIAL LIABILITIES (Level 3 Assets and Liabilities) (Details) - Mortgage revenue bonds - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2026	Sep. 30, 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	(239)	(196)
Unrealized net (loss) gain included in other comprehensive income	(303)	162
Aggregate fair value / Balance at the end of the period	6,174	6,813
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	(220)	(178)
Unrealized net (loss) gain included in other comprehensive income	(267)	149
Aggregate fair value / Balance at the end of the period	5,561	6,136
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	(19)	(18)
Unrealized net (loss) gain included in other comprehensive income	(36)	13
Aggregate fair value / Balance at the end of the period	$ 613	$ 677