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LOANS AND ALLOWANCE FOR LOAN LOSSES (Summary of Loans on Nonaccrual Status) (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Jan. 01, 2021 | Dec. 31, 2020 | Jan. 01, 2020
--- | --- | --- | --- | ---
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Nonaccrual | $ 41,866 | $ 42,448 | $ 42,448 | $ 45,204
Nonaccrual With No ALLL | 12,792 |  | 11,497 |
Loans Past Due Over 90 Days Still Accruing | 9,776 |  | 13,634 |
Construction and Land Development |  |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Nonaccrual | 2,637 | 3,072 | 3,072 | 4,060
Nonaccrual With No ALLL | 1,985 |  | 1,985 |
Loans Past Due Over 90 Days Still Accruing | 189 |  | 0 |
Commercial Real Estate - Owner Occupied |  |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Nonaccrual | 7,016 | 7,128 | 7,128 | 13,889
Nonaccrual With No ALLL | 1,994 |  | 1,994 |
Loans Past Due Over 90 Days Still Accruing | 3,180 |  | 3,727 |
Commercial Real Estate - Non-Owner Occupied |  |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Nonaccrual | 1,958 | 2,317 | 2,317 | 1,368
Nonaccrual With No ALLL | 0 |  | 0 |
Loans Past Due Over 90 Days Still Accruing | 817 |  | 148 |
Multifamily Real Estate |  |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Nonaccrual | 0 | 33 | 33 | 0
Nonaccrual With No ALLL | 0 |  | 0 |
Loans Past Due Over 90 Days Still Accruing | 0 |  | 0 |
Commercial and Industrial |  |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Nonaccrual | 2,023 | 2,107 | 2,107 | 3,037
Nonaccrual With No ALLL | 1 |  | 1 |
Loans Past Due Over 90 Days Still Accruing | 654 |  | 1,114 |
Residential 1-4 Family - Commercial |  |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Nonaccrual | 9,190 | 9,993 | 9,993 | 6,492
Nonaccrual With No ALLL | 6,388 |  | 6,388 |
Loans Past Due Over 90 Days Still Accruing | 576 |  | 1,560 |
Residential 1-4 Family - Consumer |  |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Nonaccrual | 14,770 | 12,600 | 12,600 | 13,117
Nonaccrual With No ALLL | 2,364 |  | 1,069 |
Loans Past Due Over 90 Days Still Accruing | 3,041 |  | 5,699 |
Residential 1-4 Family - Revolving |  |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Nonaccrual | 3,853 | 4,629 | 4,629 | 2,490
Nonaccrual With No ALLL | 60 |  | 60 |
Loans Past Due Over 90 Days Still Accruing | 917 |  | 826 |
Auto |  |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Nonaccrual | 303 | 500 | 500 | 565
Nonaccrual With No ALLL | 0 |  | 0 |
Loans Past Due Over 90 Days Still Accruing | 154 |  | 166 |
Consumer |  |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Nonaccrual | 116 | $ 69 | 69 | 88
Nonaccrual With No ALLL | 0 |  | 0 |
Loans Past Due Over 90 Days Still Accruing | 248 |  | 394 |
Other Commercial |  |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Nonaccrual | 0 |  | 0 | $ 98
Nonaccrual With No ALLL |  |  | 0 |
Loans Past Due Over 90 Days Still Accruing | $ 0 |  | $ 0 |

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