ACCUMULATED OTHER COMPREHENSIVE LOSS - Reclassification of component (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
ACCUMULATED OTHER COMPREHENSIVE LOSS
Interest expense - Deposits	$ 7,229	$ 7,476	$ 7,295	$ 7,091	$ 7,524	$ 7,821	$ 7,635	$ 7,477
Other expense									$ 3,012	$ 3,248
Provision for income taxes	236	540	(70)	478	187	237	(109)	483	1,184	798
Net income	$ 1,442	$ 2,544	$ (282)	$ 1,908	$ 889	$ 1,183	$ (375)	$ 1,904	5,612	3,601	$ (3,346)
AMOUNT RECLASSIFIED FROM ACCUMULATED OTHER COMPREHENSIVE LOSS
ACCUMULATED OTHER COMPREHENSIVE LOSS
Net income									(22)	(171)
Interest rate hedge | AMOUNT RECLASSIFIED FROM ACCUMULATED OTHER COMPREHENSIVE LOSS
ACCUMULATED OTHER COMPREHENSIVE LOSS
Interest expense - Deposits									(28)	(687)
Provision for income taxes									6	144
Net income									$ (22)	(543)
Amortization of estimated defined benefit pension plan loss | AMOUNT RECLASSIFIED FROM ACCUMULATED OTHER COMPREHENSIVE LOSS
ACCUMULATED OTHER COMPREHENSIVE LOSS
Other expense										471
Provision for income taxes										(99)
Net income										$ 372