LOANS AND ALLOWANCE FOR CREDIT LOSSES - Risk Ratings by Category of Loans (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2024	Dec. 31, 2023
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	$ 930,889
Origination Year, 2023	1,117,163
Origination Year, 2022	2,209,678
Origination Year, 2021	1,219,922
Origination Year, 2020	546,934
Origination Year, Prior	664,751
Revolving Loans	747,299
Revolving Loans Converted to Term Loans	114,488
Total loans	7,551,124	$ 7,925,133
Current period gross charge-offs
Origination Year, 2024	0
Origination Year, 2023	1,217
Origination Year, 2022	570
Origination Year, 2021	850
Origination Year, 2020	421
Origination Year, Prior	76
Revolving Loans	410
Revolving Loans Converted to Term Loans	2,311
Current-period gross charge-offs, Total	5,855
Pass
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	895,126
Origination Year, 2023	1,083,040
Origination Year, 2022	2,147,004
Origination Year, 2021	1,165,203
Origination Year, 2020	510,395
Origination Year, Prior	615,923
Revolving Loans	726,334
Revolving Loans Converted to Term Loans	98,222
Total loans	7,241,247	7,714,375
Special Mention
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	21,560
Origination Year, 2023	15,308
Origination Year, 2022	48,438
Origination Year, 2021	27,465
Origination Year, 2020	29,576
Origination Year, Prior	22,212
Revolving Loans	11,969
Revolving Loans Converted to Term Loans	3,755
Total loans	180,283	78,011
Substandard
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	14,203
Origination Year, 2023	18,772
Origination Year, 2022	14,236
Origination Year, 2021	27,254
Origination Year, 2020	6,963
Origination Year, Prior	26,616
Revolving Loans	8,996
Revolving Loans Converted to Term Loans	12,511
Total loans	129,551	132,699
Doubtful
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	0
Origination Year, 2023	43
Origination Year, 2022	0
Origination Year, 2021	0
Origination Year, 2020	0
Origination Year, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	43	48
Commercial and industrial
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	206,758
Origination Year, 2023	240,046
Origination Year, 2022	179,229
Origination Year, 2021	131,006
Origination Year, 2020	27,850
Origination Year, Prior	33,521
Revolving Loans	469,204
Revolving Loans Converted to Term Loans	60,262
Total loans	1,347,876	1,409,002
Current period gross charge-offs
Origination Year, 2024	0
Origination Year, 2023	1,207
Origination Year, 2022	570
Origination Year, 2021	305
Origination Year, 2020	174
Origination Year, Prior	46
Revolving Loans	410
Revolving Loans Converted to Term Loans	2,218
Current-period gross charge-offs, Total	4,930
Commercial and industrial \| Pass
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	204,235
Origination Year, 2023	237,416
Origination Year, 2022	172,538
Origination Year, 2021	129,491
Origination Year, 2020	27,316
Origination Year, Prior	22,057
Revolving Loans	463,532
Revolving Loans Converted to Term Loans	52,523
Total loans	1,309,108	1,377,118
Commercial and industrial \| Special Mention
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	1,316
Origination Year, 2023	1,297
Origination Year, 2022	2,546
Origination Year, 2021	618
Origination Year, 2020	132
Origination Year, Prior	780
Revolving Loans	2,721
Revolving Loans Converted to Term Loans	1,923
Total loans	11,333	8,340
Commercial and industrial \| Substandard
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	1,207
Origination Year, 2023	1,290
Origination Year, 2022	4,145
Origination Year, 2021	897
Origination Year, 2020	402
Origination Year, Prior	10,684
Revolving Loans	2,951
Revolving Loans Converted to Term Loans	5,816
Total loans	27,392	23,496
Commercial and industrial \| Doubtful
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	0
Origination Year, 2023	43
Origination Year, 2022	0
Origination Year, 2021	0
Origination Year, 2020	0
Origination Year, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	43	48
Paycheck Protection Program (PPP)
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	0
Origination Year, 2023	0
Origination Year, 2022	0
Origination Year, 2021	1,715
Origination Year, 2020	1,162
Origination Year, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	2,877	5,100
Current period gross charge-offs
Origination Year, 2024	0
Origination Year, 2023	0
Origination Year, 2022	0
Origination Year, 2021	0
Origination Year, 2020	0
Origination Year, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Current-period gross charge-offs, Total	0
Paycheck Protection Program (PPP) \| Pass
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	0
Origination Year, 2023	0
Origination Year, 2022	0
Origination Year, 2021	1,715
Origination Year, 2020	1,162
Origination Year, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	2,877	5,100
Paycheck Protection Program (PPP) \| Special Mention
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	0
Origination Year, 2023	0
Origination Year, 2022	0
Origination Year, 2021	0
Origination Year, 2020	0
Origination Year, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	0	0
Paycheck Protection Program (PPP) \| Substandard
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	0
Origination Year, 2023	0
Origination Year, 2022	0
Origination Year, 2021	0
Origination Year, 2020	0
Origination Year, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	0	0
Paycheck Protection Program (PPP) \| Doubtful
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	0
Origination Year, 2023	0
Origination Year, 2022	0
Origination Year, 2021	0
Origination Year, 2020	0
Origination Year, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	0	0
Real estate: \| Commercial real estate (including multi-family residential)
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	343,932
Origination Year, 2023	421,604
Origination Year, 2022	1,382,783
Origination Year, 2021	794,869
Origination Year, 2020	396,958
Origination Year, Prior	500,228
Revolving Loans	113,079
Revolving Loans Converted to Term Loans	22,843
Total loans	3,976,296	4,071,807
Current period gross charge-offs
Origination Year, 2024	0
Origination Year, 2023	0
Origination Year, 2022	0
Origination Year, 2021	541
Origination Year, 2020	245
Origination Year, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Current-period gross charge-offs, Total	786
Real estate: \| Commercial real estate (including multi-family residential) \| Pass
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	326,262
Origination Year, 2023	404,440
Origination Year, 2022	1,337,966
Origination Year, 2021	753,748
Origination Year, 2020	364,426
Origination Year, Prior	471,694
Revolving Loans	108,888
Revolving Loans Converted to Term Loans	21,454
Total loans	3,788,878	3,959,675
Real estate: \| Commercial real estate (including multi-family residential) \| Special Mention
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	16,867
Origination Year, 2023	6,647
Origination Year, 2022	37,010
Origination Year, 2021	18,064
Origination Year, 2020	27,680
Origination Year, Prior	18,400
Revolving Loans	2,285
Revolving Loans Converted to Term Loans	1,389
Total loans	128,342	54,483
Real estate: \| Commercial real estate (including multi-family residential) \| Substandard
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	803
Origination Year, 2023	10,517
Origination Year, 2022	7,807
Origination Year, 2021	23,057
Origination Year, 2020	4,852
Origination Year, Prior	10,134
Revolving Loans	1,906
Revolving Loans Converted to Term Loans	0
Total loans	59,076	57,649
Real estate: \| Commercial real estate (including multi-family residential) \| Doubtful
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	0
Origination Year, 2023	0
Origination Year, 2022	0
Origination Year, 2021	0
Origination Year, 2020	0
Origination Year, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	0	0
Real estate: \| Commercial real estate construction and land development
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	168,597
Origination Year, 2023	208,695
Origination Year, 2022	338,239
Origination Year, 2021	81,123
Origination Year, 2020	12,395
Origination Year, Prior	10,316
Revolving Loans	59,221
Revolving Loans Converted to Term Loans	11,730
Total loans	890,316	1,060,406
Current period gross charge-offs
Origination Year, 2024	0
Origination Year, 2023	0
Origination Year, 2022	0
Origination Year, 2021	0
Origination Year, 2020	0
Origination Year, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Current-period gross charge-offs, Total	0
Real estate: \| Commercial real estate construction and land development \| Pass
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	162,490
Origination Year, 2023	198,998
Origination Year, 2022	330,380
Origination Year, 2021	75,628
Origination Year, 2020	12,395
Origination Year, Prior	8,595
Revolving Loans	51,948
Revolving Loans Converted to Term Loans	11,187
Total loans	851,621	1,032,789
Real estate: \| Commercial real estate construction and land development \| Special Mention
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	2,115
Origination Year, 2023	5,372
Origination Year, 2022	7,026
Origination Year, 2021	5,495
Origination Year, 2020	0
Origination Year, Prior	1,642
Revolving Loans	6,963
Revolving Loans Converted to Term Loans	0
Total loans	28,613	9,737
Real estate: \| Commercial real estate construction and land development \| Substandard
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	3,992
Origination Year, 2023	4,325
Origination Year, 2022	833
Origination Year, 2021	0
Origination Year, 2020	0
Origination Year, Prior	79
Revolving Loans	310
Revolving Loans Converted to Term Loans	543
Total loans	10,082	17,880
Real estate: \| Commercial real estate construction and land development \| Doubtful
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	0
Origination Year, 2023	0
Origination Year, 2022	0
Origination Year, 2021	0
Origination Year, 2020	0
Origination Year, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	0	0
Real estate: \| 1-4 family residential (including home equity)
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	104,273
Origination Year, 2023	168,311
Origination Year, 2022	293,178
Origination Year, 2021	209,319
Origination Year, 2020	107,876
Origination Year, Prior	120,275
Revolving Loans	91,055
Revolving Loans Converted to Term Loans	17,948
Total loans	1,112,235	1,047,174
Current period gross charge-offs
Origination Year, 2024	0
Origination Year, 2023	0
Origination Year, 2022	0
Origination Year, 2021	0
Origination Year, 2020	2
Origination Year, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Current-period gross charge-offs, Total	2
Real estate: \| 1-4 family residential (including home equity) \| Pass
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	100,678
Origination Year, 2023	164,149
Origination Year, 2022	289,962
Origination Year, 2021	202,768
Origination Year, 2020	104,403
Origination Year, Prior	113,166
Revolving Loans	87,228
Revolving Loans Converted to Term Loans	11,404
Total loans	1,073,758	1,011,743
Real estate: \| 1-4 family residential (including home equity) \| Special Mention
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	1,262
Origination Year, 2023	1,671
Origination Year, 2022	1,835
Origination Year, 2021	3,272
Origination Year, 2020	1,764
Origination Year, Prior	1,390
Revolving Loans	0
Revolving Loans Converted to Term Loans	443
Total loans	11,637	5,384
Real estate: \| 1-4 family residential (including home equity) \| Substandard
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	2,333
Origination Year, 2023	2,491
Origination Year, 2022	1,381
Origination Year, 2021	3,279
Origination Year, 2020	1,709
Origination Year, Prior	5,719
Revolving Loans	3,827
Revolving Loans Converted to Term Loans	6,101
Total loans	26,840	30,047
Real estate: \| 1-4 family residential (including home equity) \| Doubtful
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	0
Origination Year, 2023	0
Origination Year, 2022	0
Origination Year, 2021	0
Origination Year, 2020	0
Origination Year, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	0	0
Real estate: \| Residential construction
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	79,647
Origination Year, 2023	69,332
Origination Year, 2022	12,338
Origination Year, 2021	0
Origination Year, 2020	0
Origination Year, Prior	0
Revolving Loans	177
Revolving Loans Converted to Term Loans	0
Total loans	161,494	267,357
Current period gross charge-offs
Origination Year, 2024	0
Origination Year, 2023	0
Origination Year, 2022	0
Origination Year, 2021	0
Origination Year, 2020	0
Origination Year, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Current-period gross charge-offs, Total	0
Real estate: \| Residential construction \| Pass
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	73,865
Origination Year, 2023	68,890
Origination Year, 2022	12,338
Origination Year, 2021	0
Origination Year, 2020	0
Origination Year, Prior	0
Revolving Loans	177
Revolving Loans Converted to Term Loans	0
Total loans	155,270	264,069
Real estate: \| Residential construction \| Special Mention
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	0
Origination Year, 2023	321
Origination Year, 2022	0
Origination Year, 2021	0
Origination Year, 2020	0
Origination Year, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	321	0
Real estate: \| Residential construction \| Substandard
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	5,782
Origination Year, 2023	121
Origination Year, 2022	0
Origination Year, 2021	0
Origination Year, 2020	0
Origination Year, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	5,903	3,288
Real estate: \| Residential construction \| Doubtful
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	0
Origination Year, 2023	0
Origination Year, 2022	0
Origination Year, 2021	0
Origination Year, 2020	0
Origination Year, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	0	0
Consumer and other
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	27,682
Origination Year, 2023	9,175
Origination Year, 2022	3,911
Origination Year, 2021	1,890
Origination Year, 2020	693
Origination Year, Prior	411
Revolving Loans	14,563
Revolving Loans Converted to Term Loans	1,705
Total loans	60,030	64,287
Current period gross charge-offs
Origination Year, 2024	0
Origination Year, 2023	10
Origination Year, 2022	0
Origination Year, 2021	4
Origination Year, 2020	0
Origination Year, Prior	30
Revolving Loans	0
Revolving Loans Converted to Term Loans	93
Current-period gross charge-offs, Total	137
Consumer and other \| Pass
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	27,596
Origination Year, 2023	9,147
Origination Year, 2022	3,820
Origination Year, 2021	1,853
Origination Year, 2020	693
Origination Year, Prior	411
Revolving Loans	14,561
Revolving Loans Converted to Term Loans	1,654
Total loans	59,735	63,881
Consumer and other \| Special Mention
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Origination Year, 2024	0
Origination Year, 2023	0
Origination Year, 2022	21
Origination Year, 2021	16
Origination Year, 2020	0
Origination Year, Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total loans	37	67
Consumer and other \| Substandard
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Risk Ratings by Category of Loans (Details) - USD ($)
$ in Thousands

9 Months Ended

Sep. 30, 2024

Dec. 31, 2023

Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]

Origination Year, 2024

$ 930,889

Origination Year, 2023

1,117,163

Origination Year, 2022

2,209,678

Origination Year, 2021