ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Details about Accumulated Other Comprehensive Income (Loss) Components (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax effect	$ (2,481)	$ 2,359	$ (5,123)	$ 695
Net realized losses on securities available for sale			0	(17,498)
Net income (loss)	8,810	(6,452)	18,009	(429)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income (loss)	6	13,243	12	13,249
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains and Losses on Securities Available for Sale
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax effect	0	(4,261)	0	(4,261)
Net realized losses on securities available for sale	0	17,498	0	17,498
Net income (loss)	0	13,237	0	13,237
Reclassification out of Accumulated Other Comprehensive Income | Actuarial losses
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Pension and other employee benefits	8	8	16	16
Reclassification out of Accumulated Other Comprehensive Income | Defined Benefit and Other Benefit Plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax effect	(2)	(2)	(4)	(4)
Net income (loss)	$ 6	$ 6	$ 12	$ 12