INCOME TAXES - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Deferred tax assets:
Other than temporary impairment	$ 742	$ 739
Net unrealized losses on retirement plans	1,493	3,497
Net unrealized loss on available for sale securities	38,000	35,358
Loan loss provisions	11,543	9,772
Unfunded commitments	530	528
Deferred compensation	1,863	1,711
Compensated absences	814	783
Post-retirement benefits	1,188	1,218
Lease liability	1,953	1,463
Other	4,147	3,808
GROSS DEFERRED ASSETS	62,273	58,877
Deferred tax liabilities:
Depreciation	(236)	(350)
Mortgage servicing rights	(204)	(310)
Pensions	(1,594)	(1,458)
Right-of-use asset	(1,927)	(1,452)
Intangibles	(6,246)	(6,318)
Purchase accounting	(189)	(157)
Other	(3,860)	(4,732)
GROSS DEFERRED LIABILITIES	(14,256)	(14,777)
NET DEFERRED TAX ASSETS	$ 48,017	$ 44,100