LOANS - Loan Balances and Allowance for Loan Losses for Each Impairment Method (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
LOANS
Loans receivable: Individually Evaluated		$ 19,358
Loans receivable: Collectively Evaluated		1,720,682
Loans receivable	$ 1,745,139	1,740,040
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2		453
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1		15,162
Allowance for loan losses	18,346	16,615	$ 14,271	$ 13,537
Commercial
LOANS
Loans receivable: Individually Evaluated		18,754
Loans receivable: Collectively Evaluated		1,092,744
Loans receivable		1,111,498
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2		453
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1		10,845
Allowance for loan losses		11,298	8,922	8,293
Commercial | Real estate loan
LOANS
Loans receivable: Individually Evaluated		7,154
Loans receivable: Collectively Evaluated		675,095
Loans receivable		682,249
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2		427
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1		6,647
Allowance for loan losses		7,074	5,017	4,405
Commercial | Commercial and industrial
LOANS
Loans receivable: Individually Evaluated		11,223
Loans receivable: Collectively Evaluated		167,048
Loans receivable		178,271
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2		26
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1		2,883
Allowance for loan losses		2,909	2,841	2,723
Commercial | Paycheck Protection Program - 1st Draw
LOANS
Loans receivable: Individually Evaluated		0
Loans receivable: Collectively Evaluated		5
Loans receivable		5
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2		0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1		0
Allowance for loan losses		0
Commercial | Paycheck Protection Program - 2nd Draw
LOANS
Loans receivable: Individually Evaluated		0
Loans receivable: Collectively Evaluated		163
Loans receivable		163
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2		0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1		0
Allowance for loan losses		0
Commercial | Political subdivisions
LOANS
Loans receivable: Individually Evaluated		0
Loans receivable: Collectively Evaluated		90,719
Loans receivable		90,719
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2		0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1		0
Allowance for loan losses		0
Commercial | Commercial Construction And Land
LOANS
Loans receivable: Individually Evaluated		244
Loans receivable: Collectively Evaluated		73,719
Loans receivable		73,963
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2		0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1		647
Allowance for loan losses		647	391	637
Commercial | Loans secured by farm land
LOANS
Loans receivable: Individually Evaluated		76
Loans receivable: Collectively Evaluated		12,874
Loans receivable		12,950
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2		0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1		112
Allowance for loan losses		112	129	115
Commercial | Multi-family (5 or more) residential
LOANS
Loans receivable: Individually Evaluated		0
Loans receivable: Collectively Evaluated		55,886
Loans receivable		55,886
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2		0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1		411
Allowance for loan losses		411	367	215
Commercial | Agricultural loans
LOANS
Loans receivable: Individually Evaluated		57
Loans receivable: Collectively Evaluated		2,378
Loans receivable		2,435
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2		0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1		21
Allowance for loan losses		21	27	25
Commercial | Other commercial loans
LOANS
Loans receivable: Individually Evaluated		0
Loans receivable: Collectively Evaluated		14,857
Loans receivable	384,802	14,857
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2		0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1		124
Allowance for loan losses		124	150	173
Residential mortgage
LOANS
Loans receivable: Individually Evaluated		604
Loans receivable: Collectively Evaluated		608,502
Loans receivable	401,720	609,106
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2		0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1		4,073
Allowance for loan losses		4,073	4,445	4,338
Residential mortgage | Real estate loan | first liens
LOANS
Loans receivable: Individually Evaluated		506
Loans receivable: Collectively Evaluated		509,276
Loans receivable		509,782
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2		0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1		3,413
Allowance for loan losses		3,413	3,810	3,650
Residential mortgage | Real estate loan | junior liens
LOANS
Loans receivable: Individually Evaluated		30
Loans receivable: Collectively Evaluated		24,919
Loans receivable		24,949
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2		0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1		167
Allowance for loan losses		167	181	184
Residential mortgage | Home equity lines of credit
LOANS
Loans receivable: Individually Evaluated		68
Loans receivable: Collectively Evaluated		43,730
Loans receivable		43,798
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2		0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1		282
Allowance for loan losses		282	306	302
Residential mortgage | 1-4 Family residential construction
LOANS
Loans receivable: Individually Evaluated		0
Loans receivable: Collectively Evaluated		30,577
Loans receivable		30,577
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2		0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1		211
Allowance for loan losses		211	148	202
Consumer
LOANS
Loans receivable: Individually Evaluated		0
Loans receivable: Collectively Evaluated		19,436
Loans receivable	54,153	19,436
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2		0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment1		244
Allowance for loan losses		244	237	235
Unallocated
LOANS
Allowance for loan losses	$ 0	$ 1,000	$ 667	$ 671