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LOANS AND RELATED ALLOWANCE FOR CREDIT LOSSES - Recorded investments in loans and the allowance for loan losses (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021
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LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Collectively evaluated for impairment, Loans | $ 3,206,839 |  |  |  |  |
Individually evaluated for impairment, Loans | 37,816 |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total | 3,244,655 |  |  |  |  |
Collectively evaluated for impairment, Allowance for loan losses | 32,765 |  |  |  |  |
Individually evaluated for impairment, Allowance for loan losses | 5,049 |  |  |  |  |
Allowance for credit loss | 37,814 | $ 38,776 |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | $ 2,620,253 |  |  |
Allowance for credit loss |  |  | 25,333 | $ 24,734 | $ 24,508 | $ 23,936
Loans Collectively Evaluated For Impairment [Member] |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 2,527,562 |  |  |
Allowance for credit loss |  |  | 18,984 |  |  |
Loans Individually Evaluated For Impairment [Member] |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 71,715 |  |  |
Allowance for credit loss |  |  | 6,320 |  |  |
Loans acquired with deteriorated credit quality |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 20,976 |  |  |
Allowance for credit loss |  |  | 29 |  |  |
Commercial and industrial |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Collectively evaluated for impairment, Loans | 385,594 |  |  |  |  |
Individually evaluated for impairment, Loans | 174 |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total | 385,768 |  |  |  |  |
Collectively evaluated for impairment, Allowance for loan losses | 3,730 |  |  |  |  |
Individually evaluated for impairment, Allowance for loan losses | 5 |  |  |  |  |
Allowance for credit loss | 3,735 | 2,932 |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 266,757 |  |  |
Allowance for credit loss |  |  | 3,279 | 2,981 | 2,491 | 2,440
Commercial and industrial | Loans Collectively Evaluated For Impairment [Member] |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 261,833 |  |  |
Allowance for credit loss |  |  | 3,121 |  |  |
Commercial and industrial | Loans Individually Evaluated For Impairment [Member] |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 4,818 |  |  |
Allowance for credit loss |  |  | 158 |  |  |
Commercial and industrial | Loans acquired with deteriorated credit quality |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 106 |  |  |
Commercial real estate - owner occupied |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Collectively evaluated for impairment, Loans | 303,271 |  |  |  |  |
Individually evaluated for impairment, Loans | 251 |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total | 303,522 |  |  |  |  |
Collectively evaluated for impairment, Allowance for loan losses | 2,350 |  |  |  |  |
Individually evaluated for impairment, Allowance for loan losses | 12 |  |  |  |  |
Allowance for credit loss | 2,362 | 2,535 |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 218,503 |  |  |
Allowance for credit loss |  |  | 1,193 | 1,224 | 1,511 | 1,840
Commercial real estate - owner occupied | Loans Collectively Evaluated For Impairment [Member] |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 203,558 |  |  |
Allowance for credit loss |  |  | 1,008 |  |  |
Commercial real estate - owner occupied | Loans Individually Evaluated For Impairment [Member] |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 11,366 |  |  |
Allowance for credit loss |  |  | 168 |  |  |
Commercial real estate - owner occupied | Loans acquired with deteriorated credit quality |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 3,579 |  |  |
Allowance for credit loss |  |  | 17 |  |  |
Commercial real estate - non-owner occupied |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Collectively evaluated for impairment, Loans | 868,421 |  |  |  |  |
Individually evaluated for impairment, Loans | 14,177 |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total | 882,598 |  |  |  |  |
Collectively evaluated for impairment, Allowance for loan losses | 6,280 |  |  |  |  |
Individually evaluated for impairment, Allowance for loan losses | 1,258 |  |  |  |  |
Allowance for credit loss | 7,538 | 7,840 |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 713,202 |  |  |
Allowance for credit loss |  |  | 6,721 | 6,611 | 7,014 | 8,145
Commercial real estate - non-owner occupied | Loans Collectively Evaluated For Impairment [Member] |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 671,663 |  |  |
Allowance for credit loss |  |  | 4,332 |  |  |
Commercial real estate - non-owner occupied | Loans Individually Evaluated For Impairment [Member] |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 30,509 |  |  |
Allowance for credit loss |  |  | 2,388 |  |  |
Commercial real estate - non-owner occupied | Loans acquired with deteriorated credit quality |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 11,030 |  |  |
Allowance for credit loss |  |  | 1 |  |  |
Construction and land development |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Collectively evaluated for impairment, Loans | 335,024 |  |  |  |  |
Individually evaluated for impairment, Loans | 238 |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total | 335,262 |  |  |  |  |
Collectively evaluated for impairment, Allowance for loan losses | 5,834 |  |  |  |  |
Allowance for credit loss | 5,834 | 7,574 |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 360,824 |  |  |
Allowance for credit loss |  |  | 4,223 | 4,059 | 4,493 | 4,914
Construction and land development | Loans Collectively Evaluated For Impairment [Member] |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 359,892 |  |  |
Allowance for credit loss |  |  | 4,221 |  |  |
Construction and land development | Loans Individually Evaluated For Impairment [Member] |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 82 |  |  |
Construction and land development | Loans acquired with deteriorated credit quality |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 850 |  |  |
Allowance for credit loss |  |  | 2 |  |  |
Multi-family |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Collectively evaluated for impairment, Loans | 374,578 |  |  |  |  |
Individually evaluated for impairment, Loans | 958 |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total | 375,536 |  |  |  |  |
Collectively evaluated for impairment, Allowance for loan losses | 2,603 |  |  |  |  |
Allowance for credit loss | 2,603 | 2,151 |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 287,865 |  |  |
Allowance for credit loss |  |  | 1,472 | 1,375 | 1,354 | 1,263
Multi-family | Loans Collectively Evaluated For Impairment [Member] |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 287,298 |  |  |
Allowance for credit loss |  |  | 1,470 |  |  |
Multi-family | Loans acquired with deteriorated credit quality |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 567 |  |  |
Allowance for credit loss |  |  | 2 |  |  |
One-to-four family residential |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Collectively evaluated for impairment, Loans | 476,326 |  |  |  |  |
Individually evaluated for impairment, Loans | 6,116 |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total | 482,442 |  |  |  |  |
Collectively evaluated for impairment, Allowance for loan losses | 3,705 |  |  |  |  |
Individually evaluated for impairment, Allowance for loan losses | 372 |  |  |  |  |
Allowance for credit loss | 4,077 | 4,165 |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 338,253 |  |  |
Allowance for credit loss |  |  | 1,759 | 1,696 | 1,583 | 1,311
One-to-four family residential | Loans Collectively Evaluated For Impairment [Member] |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 325,621 |  |  |
Allowance for credit loss |  |  | 1,709 |  |  |
One-to-four family residential | Loans Individually Evaluated For Impairment [Member] |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 8,399 |  |  |
Allowance for credit loss |  |  | 44 |  |  |
One-to-four family residential | Loans acquired with deteriorated credit quality |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 4,233 |  |  |
Allowance for credit loss |  |  | 6 |  |  |
Agricultural and farmland |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Collectively evaluated for impairment, Loans | 259,858 |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total | 259,858 |  |  |  |  |
Collectively evaluated for impairment, Allowance for loan losses | 2,607 |  |  |  |  |
Allowance for credit loss | 2,607 | 2,674 |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 237,746 |  |  |
Allowance for credit loss |  |  | 796 | 924 | 842 | 845
Agricultural and farmland | Loans Collectively Evaluated For Impairment [Member] |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 233,118 |  |  |
Allowance for credit loss |  |  | 796 |  |  |
Agricultural and farmland | Loans Individually Evaluated For Impairment [Member] |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 4,033 |  |  |
Agricultural and farmland | Loans acquired with deteriorated credit quality |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 595 |  |  |
Municipal, consumer, and other |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Collectively evaluated for impairment, Loans | 203,767 |  |  |  |  |
Individually evaluated for impairment, Loans | 15,902 |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total | 219,669 |  |  |  |  |
Collectively evaluated for impairment, Allowance for loan losses | 5,656 |  |  |  |  |
Individually evaluated for impairment, Allowance for loan losses | 3,402 |  |  |  |  |
Allowance for credit loss | $ 9,058 | $ 8,905 |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 197,103 |  |  |
Allowance for credit loss |  |  | 5,890 | $ 5,864 | $ 5,220 | $ 3,178
Municipal, consumer, and other | Loans Collectively Evaluated For Impairment [Member] |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 184,579 |  |  |
Allowance for credit loss |  |  | 2,327 |  |  |
Municipal, consumer, and other | Loans Individually Evaluated For Impairment [Member] |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 12,508 |  |  |
Allowance for credit loss |  |  | 3,562 |  |  |
Municipal, consumer, and other | Loans acquired with deteriorated credit quality |  |  |  |  |  |
LOANS AND THE ALLOWANCE FOR LOAN LOSSES |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total |  |  | 16 |  |  |
Allowance for credit loss |  |  | $ 1 |  |  |

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