ACQUISITIONS - Fair value (Details) - USD ($) $ in Thousands		12 Months Ended
	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2020
Liabilities assumed
Deposits	$ 379,200
Goodwill recognized	30,588	$ 30,400	$ 24,191
Core Deposits
Liabilities assumed
Estimated life		10 years
Teton Financial Services
Business Acquisition [Line Items]
Cash consideration	11,501
Common stock issued	39,818
Total fair value of consideration transferred	51,319
Assets acquired
Cash and cash equivalents	132,498
Available-for-sale securities, at fair value	18,058
Correspondent bank stock, at cost	928
Mortgage loans held for sale	840
Loans, net	251,418
Premises and equipment	17,758
Accrued interest receivable	923
Accounts receivable	95
Other receivable	520
Core deposit intangible	1,962
Other assets	468
Assets held for sale	120
Total assets acquired	425,588
Measurement Period Adjustments, Loans, net	(857)
Measurement Period Adjustments, Core deposit intangibles	698
Measurement Period Adjustments, Other assets	242
Measurement Period Adjustments, Assets held for sale	5
Measurement Period Adjustments, Total assets acquired	88
Liabilities assumed
Deposits	379,198
Accrued interest payable	26
Other liabilities	1,283
Deferred tax liabilities, net	(29)
Total liabilities assumed	380,478
Measurement Period Adjustments, Deposits	(29)
Measurement Period Adjustments, Deferred tax liabilities, net	(71)
Measurement Period Adjustments, Liabilities	(100)
Net assets acquired	45,110
Goodwill recognized	6,209
Measurement Period Adjustments, Net assets acquired	188
Measurement Period Adjustments, Goodwill recognized	(188)
Teton Financial Services | Provisional Estimate
Business Acquisition [Line Items]
Cash consideration	11,501
Common stock issued	39,818
Total fair value of consideration transferred	51,319
Assets acquired
Cash and cash equivalents	132,498
Available-for-sale securities, at fair value	18,058
Correspondent bank stock, at cost	928
Mortgage loans held for sale	840
Loans, net	252,275
Premises and equipment	17,758
Accrued interest receivable	923
Accounts receivable	95
Other receivable	520
Core deposit intangible	1,264
Other assets	226
Assets held for sale	115
Total assets acquired	425,500
Liabilities assumed
Deposits	379,227
Accrued interest payable	26
Other liabilities	1,283
Deferred tax liabilities, net	42
Total liabilities assumed	380,578
Net assets acquired	44,922
Goodwill recognized	$ 6,397