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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Summary of Credit Exposure in Company Loan Portfolio (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2021 | $ 763,835 | $ 628,756
Credit Exposure 2020 | 296,556 | 286,256
Credit Exposure 2019 | 181,846 | 212,899
Credit Exposure 2018 | 133,356 | 163,831
Credit Exposure 2017 | 107,292 | 174,558
Credit Exposure Prior | 294,966 | 274,903
Revolving Loans Amortized Cost | 130,189 | 125,616
Total | 1,908,040 | 1,866,819
Credit Exposure 2021.Charge - offs | (285) | (243)
Credit Exposure 2020.Charge - offs | (36) | (63)
Credit Exposure 2019.Charge - offs | (242) | (92)
Credit Exposure 2018.Charge - offs | (155) |
Credit Exposure 2017.Charge - offs | (589) | (12)
Credit Exposure Prior.Charge - offs | (273) | (65)
Credit Exposure Revolving Loans Amortized Cost.Charge - offs | (61) | (25)
Total | (1,641) | (543)
Credit Exposure 2021, Recoveries | 61 | 49
Credit Exposure 2020, Recoveries | 3 | 2
Credit Exposure 2019, Recoveries | 19 | 55
Credit Exposure 2018, Recoveries | 8 | 8
Credit Exposure 2017, Recoveries | 13 | 24
Credit Exposure Prior, Recoveries | 30 | 30
Credit Exposure Revolving Loans Amortized Cost, Recoveries | 21 | 44
Total | 155 | 212
Credit Exposure 2021,Current period net | (224) | (194)
Credit Exposure 2020,Current period net | (33) | (61)
Credit Exposure 2019,Current period net | (223) | (37)
Credit Exposure 2018,Current period net | (147) | (35)
Credit Exposure 2017,Current period net | (576) | 12
Credit Exposure Prior,Current period net | (243) | (35)
Credit Exposure Revolving Loans Amortized Cost,Current period net | 40 | 19
Total | (1,486) | (331)
Pass |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2021 | 763,519 | 628,236
Credit Exposure 2020 | 288,107 | 281,239
Credit Exposure 2019 | 181,039 | 205,907
Credit Exposure 2018 | 122,765 | 148,724
Credit Exposure 2017 | 88,616 | 157,326
Credit Exposure Prior | 279,890 | 264,245
Revolving Loans Amortized Cost | 130,109 | 125,616
Total | 1,854,045 | 1,811,293
Special Mention |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2021 | 76 | 496
Credit Exposure 2020 | 853 | 2,918
Credit Exposure 2019 | 5 | 3,773
Credit Exposure 2018 | 0 | 5,922
Credit Exposure 2017 | 5,521 | 7,048
Credit Exposure Prior | 832 | 652
Total | 7,287 | 20,809
Substandard |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2020 | 7,273 | 923
Credit Exposure 2019 | 668 | 2,565
Credit Exposure 2018 | 10,250 | 4,963
Credit Exposure 2017 | 13,060 | 5,192
Credit Exposure Prior | 12,626 | 8,369
Total | 43,877 | 22,012
Nonaccrual |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2021 | 240 | 24
Credit Exposure 2020 | 323 | 1,176
Credit Exposure 2019 | 134 | 654
Credit Exposure 2018 | 341 | 4,222
Credit Exposure 2017 | 95 | 4,992
Credit Exposure Prior | 1,618 | 1,637
Revolving Loans Amortized Cost | 80 |
Total | 2,831 | 12,705
Commercial and industrial |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2021 | 176,986 | 278,811
Credit Exposure 2020 | 31,798 | 30,989
Credit Exposure 2019 | 16,262 | 13,635
Credit Exposure 2018 | 6,663 | 8,456
Credit Exposure 2017 | 3,547 | 7,512
Credit Exposure Prior | 14,669 | 16,294
Revolving Loans Amortized Cost | 74,364 | 90,074
Total | 324,289 | 445,771
Credit Exposure 2019.Charge - offs | (168) | (43)
Credit Exposure 2018.Charge - offs | (67) |
Credit Exposure 2017.Charge - offs | (115) |
Credit Exposure Revolving Loans Amortized Cost.Charge - offs | (61) | (25)
Total | (411) | (68)
Credit Exposure 2019, Recoveries |  | 43
Credit Exposure Prior, Recoveries |  | 14
Credit Exposure Revolving Loans Amortized Cost, Recoveries | 21 | 44
Total | 21 | 101
Credit Exposure 2019,Current period net | (168) |
Credit Exposure 2018,Current period net | (67) |
Credit Exposure 2017,Current period net | (115) |
Credit Exposure Prior,Current period net |  | 14
Credit Exposure Revolving Loans Amortized Cost,Current period net | 40 | 19
Total | (390) | 33
Commercial and industrial | Pass |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2021 | 176,972 | 278,687
Credit Exposure 2020 | 31,337 | 30,563
Credit Exposure 2019 | 16,207 | 12,860
Credit Exposure 2018 | 6,449 | 4,366
Credit Exposure 2017 | 3,493 | 6,131
Credit Exposure Prior | 14,657 | 16,294
Revolving Loans Amortized Cost | 74,364 | 90,074
Total | 323,479 | 438,975
Commercial and industrial | Special Mention |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2021 |  | 124
Credit Exposure 2020 | 88 | 119
Credit Exposure 2019 |  | 222
Credit Exposure 2018 |  | 4,040
Credit Exposure 2017 | 14 | 1,324
Total | 102 | 5,829
Commercial and industrial | Substandard |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2020 | 272 | 307
Credit Exposure 2019 | 55 | 540
Credit Exposure 2018 | 192 | 50
Credit Exposure 2017 | 40 | 43
Credit Exposure Prior | 1 |
Total | 560 | 940
Commercial and industrial | Nonaccrual |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2021 | 14 |
Credit Exposure 2020 | 101 |
Credit Exposure 2019 |  | 13
Credit Exposure 2018 | 22 |
Credit Exposure 2017 |  | 14
Credit Exposure Prior | 11 |
Total | 148 | 27
Construction and development |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2021 | 180,056 | 118,946
Credit Exposure 2020 | 68,765 | 77,535
Credit Exposure 2019 | 21,108 | 26,217
Credit Exposure 2018 | 6,509 | 25,514
Credit Exposure 2017 | 9,179 | 8,422
Credit Exposure Prior | 13,565 | 10,507
Revolving Loans Amortized Cost | 8,615 | 3,266
Total | 307,797 | 270,407
Credit Exposure Prior, Recoveries | 1 |
Total | 1 |
Credit Exposure Prior,Current period net | 1 |
Total | 1 |
Construction and development | Pass |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2021 | 180,056 | 118,590
Credit Exposure 2020 | 68,765 | 76,926
Credit Exposure 2019 | 20,499 | 26,212
Credit Exposure 2018 | 6,507 | 24,524
Credit Exposure 2017 | 8,235 | 7,742
Credit Exposure Prior | 13,565 | 10,507
Revolving Loans Amortized Cost | 8,615 | 3,266
Total | 306,242 | 267,767
Construction and development | Special Mention |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2021 |  | 356
Credit Exposure 2020 | 0 |
Credit Exposure 2018 |  | 990
Credit Exposure 2017 | 944 |
Total | 944 | 1,346
Construction and development | Substandard |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2020 |  | 609
Credit Exposure 2019 | 609 | 5
Credit Exposure 2018 | 2 |
Credit Exposure 2017 |  | 680
Total | 611 | 1,294
Construction and development | Nonaccrual |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2019 | 0 |
Total | 0 |
Commercial real estate |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2021 | 134,617 | 91,819
Credit Exposure 2020 | 101,558 | 84,609
Credit Exposure 2019 | 80,857 | 95,245
Credit Exposure 2018 | 69,490 | 82,231
Credit Exposure 2017 | 61,020 | 101,884
Credit Exposure Prior | 159,155 | 132,538
Revolving Loans Amortized Cost | 16,145 | 5,890
Total | 622,842 | 594,216
Credit Exposure 2019.Charge - offs | 17 |
Credit Exposure 2018.Charge - offs | 56 |
Credit Exposure 2017.Charge - offs | 472 |
Credit Exposure Prior.Charge - offs | 271 |
Total | (816) |
Credit Exposure 2019, Recoveries | 19 |
Credit Exposure 2017, Recoveries | 11 |
Credit Exposure Prior, Recoveries |  | 1
Total | 30 | 1
Credit Exposure 2019,Current period net | 2 |
Credit Exposure 2018,Current period net | (56) |
Credit Exposure 2017,Current period net | (461) |
Credit Exposure Prior,Current period net | (271) | 1
Total | (786) | 1
Commercial real estate | Pass |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2021 | 134,617 | 91,819
Credit Exposure 2020 | 93,806 | 80,753
Credit Exposure 2019 | 80,733 | 89,542
Credit Exposure 2018 | 59,380 | 72,311
Credit Exposure 2017 | 43,457 | 86,946
Credit Exposure Prior | 145,477 | 123,463
Revolving Loans Amortized Cost | 16,065 | 5,890
Total | 573,535 | 550,724
Commercial real estate | Special Mention |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2021 | 0 |
Credit Exposure 2020 | 765 | 2,716
Credit Exposure 2019 |  | 3,542
Credit Exposure 2018 | 0 | 849
Credit Exposure 2017 | 4,550 | 5,724
Credit Exposure Prior | 788 | 449
Total | 6,103 | 13,280
Commercial real estate | Substandard |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2020 | 6,987 |
Credit Exposure 2019 |  | 2,010
Credit Exposure 2018 | 10,041 | 4,913
Credit Exposure 2017 | 12,981 | 4,445
Credit Exposure Prior | 12,553 | 8,240
Total | 42,562 | 19,608
Commercial real estate | Nonaccrual |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2020 | 0 | 1,140
Credit Exposure 2019 | 124 | 151
Credit Exposure 2018 | 69 | 4,158
Credit Exposure 2017 | 32 | 4,769
Credit Exposure Prior | 337 | 386
Revolving Loans Amortized Cost | 80 |
Total | 642 | 10,604
Farmland |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2021 | 94,491 | 17,444
Credit Exposure 2020 | 12,063 | 12,668
Credit Exposure 2019 | 8,664 | 10,327
Credit Exposure 2018 | 7,456 | 6,620
Credit Exposure 2017 | 5,191 | 9,904
Credit Exposure Prior | 11,346 | 15,681
Revolving Loans Amortized Cost | 6,290 | 5,864
Total | 145,501 | 78,508
Farmland | Pass |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2021 | 94,491 | 17,444
Credit Exposure 2020 | 11,868 | 12,668
Credit Exposure 2019 | 8,664 | 10,327
Credit Exposure 2018 | 7,456 | 6,620
Credit Exposure 2017 | 5,191 | 9,904
Credit Exposure Prior | 11,145 | 15,402
Revolving Loans Amortized Cost | 6,290 | 5,864
Total | 145,105 | 78,229
Farmland | Special Mention |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure Prior | 26 | 35
Total | 26 | 35
Farmland | Substandard |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure Prior | 72 | 129
Total | 72 | 129
Farmland | Nonaccrual |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2020 | 195 |
Credit Exposure Prior | 103 | 115
Revolving Loans Amortized Cost | 0 |
Total | 298 | 115
1-4 family residential |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2021 | 132,618 | 87,578
Credit Exposure 2020 | 64,590 | 62,937
Credit Exposure 2019 | 43,016 | 52,413
Credit Exposure 2018 | 36,681 | 37,268
Credit Exposure 2017 | 27,045 | 44,021
Credit Exposure Prior | 93,009 | 94,788
Revolving Loans Amortized Cost | 13,714 | 10,091
Total | 410,673 | 389,096
Credit Exposure 2017.Charge - offs |  | (9)
Credit Exposure Prior.Charge - offs |  | (59)
Total |  | (68)
Credit Exposure Prior, Recoveries |  | 2
Total |  | 2
Credit Exposure 2017,Current period net |  | (9)
Credit Exposure Prior,Current period net |  | (57)
Total |  | (66)
1-4 family residential | Pass |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2021 | 132,448 | 87,578
Credit Exposure 2020 | 64,590 | 62,937
Credit Exposure 2019 | 43,016 | 52,087
Credit Exposure 2018 | 36,501 | 37,224
Credit Exposure 2017 | 26,987 | 43,858
Credit Exposure Prior | 91,864 | 93,486
Revolving Loans Amortized Cost | 13,714 | 10,091
Total | 409,120 | 387,261
1-4 family residential | Special Mention |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure Prior | 18 | 168
Total | 18 | 168
1-4 family residential | Nonaccrual |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2021 | 170 |
Credit Exposure 2019 | 0 | 326
Credit Exposure 2018 | 180 | 44
Credit Exposure 2017 | 58 | 163
Credit Exposure Prior | 1,127 | 1,134
Total | 1,535 | 1,667
Multi-family residential |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2021 | 16,663 | 5,889
Credit Exposure 2020 | 4,286 | 4,498
Credit Exposure 2019 | 6,436 | 3,617
Credit Exposure 2018 | 908 | 1,371
Credit Exposure 2017 | 474 | 1,737
Credit Exposure Prior | 2,113 | 4,391
Revolving Loans Amortized Cost | 91 | 198
Total | 30,971 | 21,701
Multi-family residential | Pass |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2021 | 16,663 | 5,889
Credit Exposure 2020 | 4,286 | 4,498
Credit Exposure 2019 | 6,436 | 3,617
Credit Exposure 2018 | 908 | 1,371
Credit Exposure 2017 | 474 | 1,737
Credit Exposure Prior | 2,113 | 4,391
Revolving Loans Amortized Cost | 91 | 198
Total | 30,971 | 21,701
Multi-family residential | Substandard |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2017 | 0 |
Total | 0 |
Consumer and Overdrafts |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2021 | 24,847 | 24,780
Credit Exposure 2020 | 11,616 | 11,295
Credit Exposure 2019 | 4,572 | 9,509
Credit Exposure 2018 | 4,709 | 1,728
Credit Exposure 2017 | 563 | 736
Credit Exposure Prior | 543 | 513
Revolving Loans Amortized Cost | 4,478 | 2,825
Total | 51,328 | 51,386
Credit Exposure 2021.Charge - offs | (285) | (243)
Credit Exposure 2020.Charge - offs | (36) | (63)
Credit Exposure 2019.Charge - offs | (57) | (31)
Credit Exposure 2018.Charge - offs | (32) | (43)
Credit Exposure 2017.Charge - offs | (2) | (3)
Credit Exposure Prior.Charge - offs | 2 | (6)
Total | (414) | (389)
Credit Exposure 2021, Recoveries | 61 | 49
Credit Exposure 2020, Recoveries | 3 | 2
Credit Exposure 2019, Recoveries |  | 12
Credit Exposure 2018, Recoveries | 8 | 8
Credit Exposure 2017, Recoveries | 2 | 4
Credit Exposure Prior, Recoveries | 21 | 13
Total | 95 | 88
Credit Exposure 2021,Current period net | (224) | (194)
Credit Exposure 2020,Current period net | (33) | (61)
Credit Exposure 2019,Current period net | (57) | (19)
Credit Exposure 2018,Current period net | (24) | (35)
Credit Exposure 2017,Current period net |  | 1
Credit Exposure Prior,Current period net | 19 | 7
Total | (319) | (301)
Consumer and Overdrafts | Pass |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2021 | 24,715 | 24,740
Credit Exposure 2020 | 11,589 | 11,176
Credit Exposure 2019 | 4,557 | 9,369
Credit Exposure 2018 | 4,647 | 1,701
Credit Exposure 2017 | 558 | 735
Credit Exposure Prior | 543 | 513
Revolving Loans Amortized Cost | 4,478 | 2,825
Total | 51,087 | 51,059
Consumer and Overdrafts | Special Mention |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2021 | 76 | 16
Credit Exposure 2020 | 0 | 83
Credit Exposure 2019 | 5 | 9
Credit Exposure 2018 |  | 7
Total | 81 | 115
Consumer and Overdrafts | Nonaccrual |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2021 | 56 | 24
Credit Exposure 2020 | 27 | 36
Credit Exposure 2019 | 10 | 131
Credit Exposure 2018 | 62 | 20
Credit Exposure 2017 | 5 | 1
Credit Exposure Prior | 0 |
Total | 160 | 212
Agricultural |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2021 | 3,557 | 3,489
Credit Exposure 2020 | 1,880 | 1,725
Credit Exposure 2019 | 931 | 1,936
Credit Exposure 2018 | 940 | 643
Credit Exposure 2017 | 273 | 342
Credit Exposure Prior | 566 | 191
Revolving Loans Amortized Cost | 6,492 | 7,408
Total | 14,639 | 15,734
Credit Exposure 2019.Charge - offs |  | (18)
Total | (8) | (18)
Credit Exposure 2017, Recoveries |  | 20
Credit Exposure Prior, Recoveries | 8 |
Total |  | 20
Credit Exposure 2019,Current period net |  | (18)
Credit Exposure 2017,Current period net |  | 20
Credit Exposure Prior,Current period net | 8 |
Total | 8 | 2
Agricultural | Pass |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2021 | 3,557 | 3,489
Credit Exposure 2020 | 1,866 | 1,718
Credit Exposure 2019 | 927 | 1,893
Credit Exposure 2018 | 917 | 607
Credit Exposure 2017 | 221 | 273
Credit Exposure Prior | 526 | 189
Revolving Loans Amortized Cost | 6,492 | 7,408
Total | 14,506 | 15,577
Agricultural | Special Mention |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2018 |  | 36
Credit Exposure 2017 | 13 |
Total | 13 | 36
Agricultural | Substandard |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2020 | 14 | 7
Credit Exposure 2019 | 4 | 10
Credit Exposure 2018 | 15 |
Credit Exposure 2017 | 39 | 24
Credit Exposure Prior | 0 |
Total | 72 | 41
Agricultural | Nonaccrual |  |
Financing Receivable Recorded Investment [Line Items] |  |
Credit Exposure 2020 | 0 |
Credit Exposure 2019 |  | 33
Credit Exposure 2018 | 8 |
Credit Exposure 2017 | 0 | 45
Credit Exposure Prior |  | 2
Total | 48 | $ 80
Credit Exposure Prior.Charge - offs | $ (40) |

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