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LOANS AND ALLOWANCE FOR LOAN LOSSES - Loans Individually Evaluated for Impairment by Class of Loans (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment | $ 46,051 | $ 26,831 | $ 16,158
Interest Income Recognized | 582 | 256 | 207
Cash Basis Interest Recognized | 542 | 217 | 190
Unpaid Principal Balance |  |  |
Total | 49,814 | 27,027 |
Recorded Investment |  |  |
Total | 49,708 | 26,945 |
Allowance for Loan Losses | 5,990 | 829 |
Commercial | Commercial and industrial |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment | 17,263 | 5,380 | 1,034
Interest Income Recognized | 320 | 4 | 0
Cash Basis Interest Recognized | 315 | 4 | 0
Unpaid Principal Balance |  |  |
With no related allowance recorded | 1,471 | 5,491 |
With an allowance recorded | 18,776 | 0 |
Recorded Investment |  |  |
With no related allowance recorded | 1,460 | 5,455 |
With an allowance recorded | 18,776 | 0 |
Allowance for Loan Losses | 3,367 | 0 |
Commercial | Commercial real estate |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment | 145 | 0 | 0
Interest Income Recognized | 0 | 0 | 0
Cash Basis Interest Recognized | 0 | 0 | 0
Commercial | SBA |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment | 4,673 | 986 | 357
Interest Income Recognized | 15 | 4 | 0
Cash Basis Interest Recognized | 15 | 3 | 0
Unpaid Principal Balance |  |  |
With no related allowance recorded | 1,439 | 1,668 |
With an allowance recorded | 3,921 | 823 |
Recorded Investment |  |  |
With no related allowance recorded | 1,379 | 1,588 |
With an allowance recorded | 3,757 | 788 |
Allowance for Loan Losses | 2,045 | 562 |
Commercial | Construction |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment | 1,889 | 0 | 382
Interest Income Recognized | 0 | 0 | 0
Cash Basis Interest Recognized | 0 | 0 | 0
Commercial | Lease financing |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment | 0 | 0 | 19
Interest Income Recognized | 0 | 0 | 0
Cash Basis Interest Recognized | 0 | 0 | 0
Consumer | Single family residential mortgage |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment | 21,198 | 19,694 | 12,611
Interest Income Recognized | 234 | 236 | 199
Cash Basis Interest Recognized | 199 | 199 | 182
Unpaid Principal Balance |  |  |
With no related allowance recorded | 19,319 | 12,115 |
With an allowance recorded | 4,213 | 5,993 |
Recorded Investment |  |  |
With no related allowance recorded | 19,405 | 12,161 |
With an allowance recorded | 4,252 | 6,032 |
Allowance for Loan Losses | 574 | 161 |
Consumer | Other consumer |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment | 883 | 771 | 1,757
Interest Income Recognized | 13 | 12 | 8
Cash Basis Interest Recognized | 13 | 11 | $ 8
Unpaid Principal Balance |  |  |
With no related allowance recorded | 671 | 469 |
With an allowance recorded | 4 | 468 |
Recorded Investment |  |  |
With no related allowance recorded | 675 | 469 |
With an allowance recorded | 4 | 452 |
Allowance for Loan Losses | $ 4 | $ 106 |

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