ALLOWANCE FOR CREDIT LOSSES - Loans by risk grades, loan class and vintage (Details) - USD ($)	Sep. 30, 2022	Dec. 31, 2021
Financing Receivable, Recorded Investment [Line Items]
2022	$ 824,645,000
2021	724,209,000	$ 841,230,000
2020	339,399,000	406,444,000
2019	266,732,000	391,641,000
2018	178,667,000	294,205,000
2017		136,629,000
Prior	326,729,000	317,225,000
Revolving Loans	417,589,000	451,550,000
Converted revolving loan	57,921,000	37,503,000
Total Loans	3,135,891,000	2,876,427,000
Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total Loans	568,071,000	634,384,000
Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,242,118,000	1,091,969,000
Construction and development
Financing Receivable, Recorded Investment [Line Items]
Total Loans	507,570,000	460,719,000
1-4 family residential
Financing Receivable, Recorded Investment [Line Items]
Total Loans	288,456,000	277,273,000
Multifamily residential
Financing Receivable, Recorded Investment [Line Items]
Total Loans	370,391,000	286,396,000
Consumer
Financing Receivable, Recorded Investment [Line Items]
Total Loans	24,509,000	28,090,000
Agriculture
Financing Receivable, Recorded Investment [Line Items]
Total Loans	11,185,000	7,941,000
Other:
Financing Receivable, Recorded Investment [Line Items]
Total Loans	123,591,000	89,655,000
Loans by risk grades | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
2022	97,529,000
2021	131,496,000	230,432,000
2020	29,688,000	54,758,000
2019	43,929,000	62,656,000
2018	19,127,000	28,149,000
2017		8,121,000
Prior	6,062,000	5,924,000
Revolving Loans	212,264,000	233,071,000
Converted revolving loan	27,976,000	11,273,000
Total Loans	568,071,000	634,384,000
Loans by risk grades | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
2022	409,433,000
2021	226,063,000	243,666,000
2020	197,364,000	200,578,000
2019	167,829,000	245,900,000
2018	89,488,000	164,081,000
2017		70,329,000
Prior	80,967,000	87,506,000
Revolving Loans	42,858,000	55,253,000
Converted revolving loan	28,116,000	24,656,000
Total Loans	1,242,118,000	1,091,969,000
Loans by risk grades | Construction and development
Financing Receivable, Recorded Investment [Line Items]
2022	169,996,000
2021	183,167,000	197,900,000
2020	27,833,000	100,182,000
2019	24,518,000	54,017,000
2018	8,589,000	8,627,000
2017		26,340,000
Prior	19,164,000	859,000
Revolving Loans	74,221,000	72,698,000
Converted revolving loan	82,000	96,000
Total Loans	507,570,000	460,719,000
Loans by risk grades | 1-4 family residential
Financing Receivable, Recorded Investment [Line Items]
2022	64,430,000
2021	109,284,000	115,451,000
2020	20,826,000	24,846,000
2019	12,141,000	20,724,000
2018	23,762,000	32,318,000
2017		21,733,000
Prior	48,977,000	53,717,000
Revolving Loans	7,289,000	8,018,000
Converted revolving loan	1,747,000	466,000
Total Loans	288,456,000	277,273,000
Loans by risk grades | Multifamily residential
Financing Receivable, Recorded Investment [Line Items]
2022	50,748,000
2021	35,442,000	16,744,000
2020	59,609,000	18,236,000
2019	17,732,000	6,473,000
2018	35,974,000	58,750,000
2017		9,784,000
Prior	170,319,000	167,033,000
Revolving Loans	567,000	9,376,000
Total Loans	370,391,000	286,396,000
Loans by risk grades | Consumer
Financing Receivable, Recorded Investment [Line Items]
2022	5,356,000
2021	3,290,000	6,427,000
2020	2,519,000	3,677,000
2019	558,000	1,199,000
2018	446,000	714,000
2017		277,000
Prior	48,000	11,000
Revolving Loans	12,292,000	15,006,000
Converted revolving loan		779,000
Total Loans	24,509,000	28,090,000
Loans by risk grades | Agriculture
Financing Receivable, Recorded Investment [Line Items]
2022	4,680,000
2021	722,000	2,954,000
2020	362,000	423,000
2019	24,000	42,000
2018	26,000	57,000
2017		35,000
Prior	43,000	18,000
Revolving Loans	5,328,000	4,222,000
Converted revolving loan		190,000
Total Loans	11,185,000	7,941,000
Loans by risk grades | Other:
Financing Receivable, Recorded Investment [Line Items]
2022	22,473,000
2021	34,745,000	27,656,000
2020	1,198,000	3,744,000
2019	1,000	630,000
2018	1,255,000	1,509,000
2017		10,000
Prior	1,149,000	2,157,000
Revolving Loans	62,770,000	53,906,000
Converted revolving loan		43,000
Total Loans	123,591,000	89,655,000
Pass
Financing Receivable, Recorded Investment [Line Items]
2022	824,224,000
2021	722,852,000	841,230,000
2020	336,443,000	400,127,000
2019	255,360,000	375,159,000
2018	162,584,000	262,223,000
2017		125,958,000
Prior	315,245,000	312,527,000
Revolving Loans	415,808,000	445,115,000
Converted revolving loan	41,575,000	21,046,000
Total Loans	3,074,091,000	2,783,385,000
Pass | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
2022	97,529,000
2021	131,496,000	230,432,000
2020	29,688,000	53,744,000
2019	41,184,000	60,514,000
2018	15,542,000	21,059,000
2017		8,117,000
Prior	5,762,000	5,533,000
Revolving Loans	210,724,000	228,247,000
Converted revolving loan	23,616,000	5,773,000
Total Loans	555,541,000	613,419,000
Pass | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
2022	409,433,000
2021	226,016,000	243,666,000
2020	196,281,000	197,625,000
2019	159,697,000	232,074,000
2018	80,581,000	141,591,000
2017		69,995,000
Prior	77,497,000	84,398,000
Revolving Loans	42,858,000	55,253,000
Converted revolving loan	17,631,000	13,799,000
Total Loans	1,209,994,000	1,038,401,000
Pass | Construction and development
Financing Receivable, Recorded Investment [Line Items]
2022	169,575,000
2021	183,167,000	197,900,000
2020	27,542,000	99,420,000
2019	24,518,000	54,017,000
2018	5,889,000	7,127,000
2017		16,133,000
Prior	11,691,000	142,000
Revolving Loans	74,221,000	72,698,000
Converted revolving loan	82,000	96,000
Total Loans	496,685,000	447,533,000
Pass | 1-4 family residential
Financing Receivable, Recorded Investment [Line Items]
2022	64,430,000
2021	107,974,000	115,451,000
2020	19,278,000	23,298,000
2019	11,647,000	20,210,000
2018	22,871,000	31,416,000
2017		21,607,000
Prior	48,751,000	53,253,000
Revolving Loans	7,289,000	6,516,000
Converted revolving loan	246,000	466,000
Total Loans	282,486,000	272,217,000
Pass | Multifamily residential
Financing Receivable, Recorded Investment [Line Items]
2022	50,748,000
2021	35,442,000	16,744,000
2020	59,609,000	18,236,000
2019	17,732,000	6,473,000
2018	35,974,000	58,750,000
2017		9,784,000
Prior	170,319,000	167,033,000
Revolving Loans	567,000	9,376,000
Total Loans	370,391,000	286,396,000
Pass | Consumer
Financing Receivable, Recorded Investment [Line Items]
2022	5,356,000
2021	3,290,000	6,427,000
2020	2,485,000	3,637,000
2019	558,000	1,199,000
2018	446,000	714,000
2017		277,000
Prior	48,000	11,000
Revolving Loans	12,095,000	14,921,000
Converted revolving loan		679,000
Total Loans	24,278,000	27,865,000
Pass | Agriculture
Financing Receivable, Recorded Investment [Line Items]
2022	4,680,000
2021	722,000	2,954,000
2020	362,000	423,000
2019	24,000	42,000
2018	26,000	57,000
2017		35,000
Prior	28,000
Revolving Loans	5,284,000	4,198,000
Converted revolving loan		190,000
Total Loans	11,126,000	7,899,000
Pass | Other:
Financing Receivable, Recorded Investment [Line Items]
2022	22,473,000
2021	34,745,000	27,656,000
2020	1,198,000	3,744,000
2019		630,000
2018	1,255,000	1,509,000
2017		10,000
Prior	1,149,000	2,157,000
Revolving Loans	62,770,000	53,906,000
Converted revolving loan		43,000
Total Loans	123,590,000	89,655,000
Special Mention
Financing Receivable, Recorded Investment [Line Items]
2022	421,000
2020		470,000
2019		1,149,000
2018	2,161,000	7,949,000
Prior		62,000
Revolving Loans		3,177,000
Total Loans	2,582,000	12,807,000
Special Mention | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
2019		290,000
2018		15,000
Revolving Loans		3,177,000
Total Loans		3,482,000
Special Mention | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
2019		859,000
2018	2,161,000	7,934,000
Prior		62,000
Total Loans	2,161,000	8,855,000
Special Mention | Construction and development
Financing Receivable, Recorded Investment [Line Items]
2022	421,000
2020		470,000
Total Loans	421,000	470,000
Substandard
Financing Receivable, Recorded Investment [Line Items]
2021	1,357,000
2020	2,956,000	5,847,000
2019	11,372,000	15,333,000
2018	13,922,000	24,033,000
2017		10,671,000
Prior	11,484,000	4,636,000
Revolving Loans	1,781,000	3,258,000
Converted revolving loan	16,346,000	16,457,000
Total Loans	59,218,000	80,235,000
Substandard | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
2020		1,014,000
2019	2,745,000	1,852,000
2018	3,585,000	7,075,000
2017		4,000
Prior	300,000	391,000
Revolving Loans	1,540,000	1,647,000
Converted revolving loan	4,360,000	5,500,000
Total Loans	12,530,000	17,483,000
Substandard | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
2021	47,000
2020	1,083,000	2,953,000
2019	8,132,000	12,967,000
2018	6,746,000	14,556,000
2017		334,000
Prior	3,470,000	3,046,000
Converted revolving loan	10,485,000	10,857,000
Total Loans	29,963,000	44,713,000
Substandard | Construction and development
Financing Receivable, Recorded Investment [Line Items]
2020	291,000	292,000
2018	2,700,000	1,500,000
2017		10,207,000
Prior	7,473,000	717,000
Total Loans	10,464,000	12,716,000
Substandard | 1-4 family residential
Financing Receivable, Recorded Investment [Line Items]
2021	1,310,000
2020	1,548,000	1,548,000
2019	494,000	514,000
2018	891,000	902,000
2017		126,000
Prior	226,000	464,000
Revolving Loans		1,502,000
Converted revolving loan	1,501,000
Total Loans	5,970,000	5,056,000
Substandard | Consumer
Financing Receivable, Recorded Investment [Line Items]
2020	34,000	40,000
Revolving Loans	197,000	85,000
Converted revolving loan		100,000
Total Loans	231,000	225,000
Substandard | Agriculture
Financing Receivable, Recorded Investment [Line Items]
Prior	15,000	18,000
Revolving Loans	44,000	24,000
Total Loans	59,000	$ 42,000
Substandard | Other:
Financing Receivable, Recorded Investment [Line Items]
2019	1,000
Total Loans	1,000
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 0