LOANS AND ALLOWANCE FOR CREDIT LOSSES - Summary of Loans by Type (Details) - USD ($)	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	$ 1,893,207,000		$ 1,848,139,000
Allowance for credit losses on loans	(20,382,000)	$ (20,023,000)	(19,208,000)	$ (19,056,000)	$ (18,346,000)	$ (16,615,000)
Loans, net	1,872,825,000		1,828,931,000
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums, Total	4,475,000		4,459,000
Commercial | Commercial real estate - non-owner occupied
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	723,964,000		737,342,000
Allowance for credit losses on loans	(12,177,000)	(12,533,000)	(12,010,000)	(10,603,000)	(9,654,000)	(6,305,000)
Commercial | Commercial real estate - owner occupied
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	267,169,000		237,246,000
Allowance for credit losses on loans	(2,901,000)	(2,718,000)	(2,116,000)	(2,025,000)	(1,942,000)	(1,942,000)
Commercial | All other commercial loans
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	431,106,000		399,693,000
Allowance for credit losses on loans	(3,678,000)	(3,580,000)	(2,918,000)	(3,686,000)	(3,580,000)	(4,142,000)
Residential mortgage loans
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	409,824,000		413,714,000
Allowance for credit losses on loans	(1,112,000)	(769,000)	(1,764,000)	(2,464,000)	(2,864,000)	(2,751,000)
Consumer loans
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	61,144,000		60,144,000
Allowance for credit losses on loans	$ (514,000)	$ (423,000)	$ (400,000)	$ (278,000)	$ (306,000)	$ (475,000)