INCOME TAXES, Components of Net Deferred Tax Liability (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Components of net deferred tax liability [Abstract]
Allowance for loan losses	$ 12,435	$ 15,004
Employee benefits	7,708	7,552
Operating lease liabilities	7,955	8,601
Other, net	1,250	900
Deferred tax asset	29,348	32,057
Investment securities	7,227	43,325
Goodwill and intangibles	41,917	40,802
Operating lease right-of-use assets	7,693	8,384
Loan origination costs	8,993	7,904
Depreciation	535	3,089
Mortgage servicing rights	278	291
Pension	22,950	16,987
Deferred tax liability	89,593	120,782
Net deferred tax liability	$ (60,245)	$ (88,725)