ALLOWANCE FOR LOAN LOSSES - ACL for loans by loan class (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Loan Category
Allowance for credit losses on loans	$ 31,345	$ 40,637	$ 25,280	$ 23,693
Allowance for loan losses (as a percent)	100.00%	100.00%
Loans excluding loans held for sale	$ 2,867,524	$ 2,924,117
ACL for loans to loans excluding loans held for sale	1.09%	1.39%
Commercial and industrial
Loan Category
Allowance for credit losses on loans	$ 11,214	$ 13,035	7,671	7,719
Allowance for loan losses (as a percent)	35.70%	32.10%
Commercial real estate
Loan Category
Allowance for credit losses on loans	$ 11,015	$ 13,798	7,975	6,730
Allowance for loan losses (as a percent)	35.10%	34.00%
Construction and development
Loan Category
Allowance for credit losses on loans	$ 3,310	$ 6,089	4,446	4,298
Allowance for loan losses (as a percent)	10.60%	15.00%
1-4 family residential
Loan Category
Allowance for credit losses on loans	$ 2,105	$ 2,578	2,257	2,281
Allowance for loan losses (as a percent)	6.70%	6.30%
Multifamily residential
Loan Category
Allowance for credit losses on loans	$ 1,781	$ 2,513	1,699	1,511
Allowance for loan losses (as a percent)	5.70%	6.20%
Consumer
Loan Category
Allowance for credit losses on loans	$ 406	$ 440	388	387
Allowance for loan losses (as a percent)	1.30%	1.10%
Agriculture
Loan Category
Allowance for credit losses on loans	$ 88	$ 137	$ 74	$ 62
Allowance for loan losses (as a percent)	0.30%	0.30%
Other:
Loan Category
Allowance for credit losses on loans	$ 1,426	$ 2,047
Allowance for loan losses (as a percent)	4.60%	5.00%