INCOME TAXES - Schedule of the deferred tax assets and liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets:
ACL	$ 26,979	$ 25,884
Unrealized loss on cash flow hedge	8,365	273
Unrealized losses on securities available for sale	88,666	9,199
Unrealized losses on securities held to maturity	11,919	0
Stock-based compensation	5,504	4,204
Deferred compensation	53	55
Purchase accounting adjustments	656	1,213
Accrued vacation	411	398
Lease liabilities	3,564	2,893
Employee costs	3,298	2,847
Other	376	390
Total deferred tax assets	149,791	47,356
Deferred tax liabilities:
Basis in premises and equipment	(1,541)	(1,347)
Affordable housing partnerships and other investments	(6,669)	(3,696)
Purchase accounting adjustments	(1,207)	(1,362)
Mortgage servicing assets	(2,132)	(2,853)
Basis in core deposit, customer intangible assets, and asset purchase goodwill	(6,956)	(9,485)
Deferred loan origination costs	(3,845)	(2,454)
Right of use assets	(3,518)	(2,877)
Unrealized gain on equity securities	(512)	(1,099)
Other	(586)	(560)
Total deferred tax liabilities	(26,966)	(25,733)
Net deferred tax asset	$ 122,825	$ 21,623