LOANS AND ALLOWANCE FOR CREDIT LOSSES - Risk ratings (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2024 USD ($) loan	Sep. 30, 2024 USD ($) loan	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) loan
Term Loan by Origination Year
2023/2024	$ 339,297	$ 339,297		$ 482,790
2022/2023	346,215	346,215		942,661
2021/2022	875,713	875,713		946,300
2020/2021	869,734	869,734		374,022
2019/2020	338,540	338,540		106,335
Prior	297,490	297,490		266,442
Revolving Loans	20,837	20,837		23,555
Total Financing Receivables	3,087,826	3,087,826		3,142,105
Gross write-offs	28	28	$ 452
Doubtful
Term Loan by Origination Year
Total Financing Receivables	0	0		0
Loss
Term Loan by Origination Year
Total Financing Receivables	0	0		0
Construction and development
Term Loan by Origination Year
2023/2024	6,080	6,080		7,715
2022/2023	2,568	2,568		13,273
2021/2022	5,556	5,556		682
2020/2021	727	727		1,187
2019/2020	1,164	1,164
Prior	231	231		259
Total Financing Receivables	16,326	16,326		23,116
Revolving loans converted to term loan	$ 16,300	$ 16,300		$ 30,100
Number of loans converted to Commercial Real Estate term loans | loan	4	4		5
Construction and development | Pass
Term Loan by Origination Year
2023/2024	$ 6,080	$ 6,080		$ 7,715
2022/2023	2,568	2,568		13,273
2021/2022	5,556	5,556		134
2020/2021	179	179		1,187
2019/2020	1,164	1,164
Prior	231	231		259
Total Financing Receivables	15,778	15,778		22,568
Construction and development | Substandard
Term Loan by Origination Year
2021/2022				548
2020/2021	548	548
Total Financing Receivables	548	548		548
Commercial real estate
Term Loan by Origination Year
2023/2024	84,643	84,643		157,572
2022/2023	152,363	152,363		198,180
2021/2022	202,164	202,164		104,480
2020/2021	98,815	98,815		82,282
2019/2020	76,298	76,298		41,828
Prior	118,301	118,301		119,730
Revolving Loans	3,280	3,280		4,240
Total Financing Receivables	735,864	735,864		708,312
Gross write-offs			231
Commercial real estate | Pass
Term Loan by Origination Year
2023/2024	84,643	84,643		157,572
2022/2023	152,363	152,363		197,590
2021/2022	201,589	201,589		104,480
2020/2021	98,815	98,815		80,124
2019/2020	74,174	74,174		34,147
Prior	112,233	112,233		115,147
Revolving Loans	3,280	3,280		4,240
Total Financing Receivables	727,097	727,097		693,300
Commercial real estate | Special Mention
Term Loan by Origination Year
2020/2021				1,925
2019/2020	1,890	1,890
Total Financing Receivables	1,890	1,890		1,925
Commercial real estate | Substandard
Term Loan by Origination Year
2022/2023				590
2021/2022	575	575
2020/2021				233
2019/2020	234	234		7,681
Prior	6,068	6,068		4,583
Total Financing Receivables	6,877	6,877		13,087
Commercial real estate | Write-offs
Term Loan by Origination Year
2021/2022				224
Prior				231
Total Financing Receivables				455
Commercial and industrial
Term Loan by Origination Year
2023/2024	4,638	4,638		16,411
2022/2023	17,674	17,674		13,324
2021/2022	11,274	11,274		5,877
2020/2021	4,217	4,217		3,544
2019/2020	3,196	3,196		2,769
Prior	4,841	4,841		4,362
Revolving Loans	17,557	17,557		19,315
Total Financing Receivables	63,397	63,397		65,602
Gross write-offs	28	28	$ 221
Commercial and industrial | Pass
Term Loan by Origination Year
2023/2024	4,638	4,638		16,411
2022/2023	17,674	17,674		13,324
2021/2022	10,925	10,925		4,595
2020/2021	4,022	4,022		3,192
2019/2020	2,847	2,847		2,353
Prior	3,407	3,407		3,141
Revolving Loans	17,557	17,557		19,315
Total Financing Receivables	61,070	61,070		62,331
Commercial and industrial | Special Mention
Term Loan by Origination Year
2019/2020				211
Prior	1,207	1,207		1,201
Total Financing Receivables	1,207	1,207		1,412
Commercial and industrial | Substandard
Term Loan by Origination Year
2021/2022	349	349		1,282
2020/2021	195	195		352
2019/2020	349	349		205
Prior	227	227		20
Total Financing Receivables	1,120	1,120		1,859
Commercial and industrial | Write-offs
Term Loan by Origination Year
2021/2022				142
2019/2020				79
Prior	28	28		88
Total Financing Receivables	28	28		309
Residential real estate
Term Loan by Origination Year
2023/2024	243,721	243,721		300,773
2022/2023	173,610	173,610		717,884
2021/2022	656,719	656,719		835,261
2020/2021	765,975	765,975		287,009
2019/2020	257,882	257,882		61,738
Prior	174,117	174,117		142,091
Total Financing Receivables	2,272,024	2,272,024		2,344,756
Residential real estate | Pass
Term Loan by Origination Year
2023/2024	243,721	243,721		300,773
2022/2023	172,655	172,655		717,527
2021/2022	655,659	655,659		833,840
2020/2021	762,799	762,799		284,535
2019/2020	255,847	255,847		60,356
Prior	165,565	165,565		134,859
Total Financing Receivables	2,256,246	2,256,246		2,331,890
Residential real estate | Substandard
Term Loan by Origination Year
2022/2023	955	955		357
2021/2022	1,060	1,060		1,421
2020/2021	3,176	3,176		2,474
2019/2020	2,035	2,035		1,382
Prior	8,552	8,552		7,232
Total Financing Receivables	15,778	15,778		12,866
Consumer and other
Term Loan by Origination Year
2023/2024	215	215		319
Total Financing Receivables	215	215		319
Consumer and other | Pass
Term Loan by Origination Year
2023/2024	215	215		319
Total Financing Receivables	$ 215	$ 215		$ 319