LOANS AND ALLOWANCE FOR CREDIT LOSSES - Summary of Loans by Type (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	$ 1,895,848,000	$ 1,848,139,000
Allowance for credit losses on loans	(20,035,000)	(19,208,000)	$ (16,615,000)
Loans, net	1,875,813,000	1,828,931,000
Net of deferred loan origination fees	4,136,000	4,459,000
Commercial | Commercial real estate - non-owner occupied
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	739,565,000	737,342,000
Allowance for credit losses on loans	(11,964,000)	(12,010,000)	(6,305,000)
Commercial | Commercial real estate - owner occupied
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	261,071,000	237,246,000
Allowance for credit losses on loans	(2,844,000)	(2,116,000)	(1,942,000)
Commercial | All other commercial loans
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	423,277,000	399,693,000
Allowance for credit losses on loans	(3,361,000)	(2,918,000)	(4,142,000)
Residential mortgage loans
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	408,009,000	413,714,000
Allowance for credit losses on loans	(1,356,000)	(1,764,000)	(2,751,000)
Consumer loans
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	63,926,000	60,144,000
Allowance for credit losses on loans	$ (510,000)	$ (400,000)	$ (475,000)