SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Summary Of Significant Accounting Policies [Line Items]
Debt securities, AFS, accrued interest, reversed against interest income	$ 0	$ 0	$ 0
Debt securities, HTM, accrued interest, reversed against interest income	0	0	0
Securities held-to-maturity	691,484,000	0
Trading account securities on hand	0	0
Equity securities	0	0
Other-than-temporary impairment	0	0	0
Minimum loan balance to individual evaluation for impairment	$ 500,000
Useful life of intangible assets (in years)	10 years
Advertising expense	$ 393,000	391,000	333,000
Other real estate owned	4,832,000	2,565,000
Allowance for Loan Losses	38,917,000	30,742,000	35,820,000
Allowance for credit losses on OBSC exposures	$ 1,325,000	1,070,000	0
Building | Minimum
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	10 years
Building | Maximum
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	39 years
Furniture and Fixtures | Minimum
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	3 years
Furniture and Fixtures | Maximum
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	10 years
Limited Partner
Summary Of Significant Accounting Policies [Line Items]
Payments to acquire limited partnership interests	$ 4,400,000
Real estate investments	1,600,000	2,100,000
Affordable housing tax credits and other tax benefits	$ 481,000	$ 481,000	$ 481,000