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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Summary of Past Due Loans (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | $ 6,212 | $ 21,403
Current | 2,527,942 | 2,541,482
Total loans | 2,534,154 | 2,562,885
Past Due More Than 90 days and Accruing | 620 | 267
30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 1,148 | 12,307
60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 1,149 | 4,263
90 Days or Greater Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 3,915 | 4,833
Total commercial real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans |  | 1,084,381
Total commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans |  | 441,069
Commercial construction | Total commercial loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due |  | 75
Current | 152,700 | 117,807
Total loans | 152,700 | 117,882
Commercial construction | Total commercial loans | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due |  | 74
Commercial construction | Total commercial loans | 90 Days or Greater Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due |  | 1
Commercial real estate owner occupied | Total commercial real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 637 | 2,211
Current | 253,155 | 217,006
Total loans | 253,792 | 219,217
Past Due More Than 90 days and Accruing | 366 |
Commercial real estate owner occupied | Total commercial real estate | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due |  | 1,309
Commercial real estate owner occupied | Total commercial real estate | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 10 | 464
Commercial real estate owner occupied | Total commercial real estate | 90 Days or Greater Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 627 | 438
Commercial real estate non-owner occupied | Total commercial real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 431 | 1,801
Current | 732,922 | 714,975
Total loans | 733,353 | 716,776
Commercial real estate non-owner occupied | Total commercial real estate | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 314 | 503
Commercial real estate non-owner occupied | Total commercial real estate | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due |  | 674
Commercial real estate non-owner occupied | Total commercial real estate | 90 Days or Greater Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 117 | 624
Tax exempt |  |
Financing Receivable, Past Due [Line Items] |  |
Current | 42,448 | 47,862
Total loans | 42,448 | 47,862
Commercial and industrial | Total commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 392 | 354
Current | 336,597 | 355,330
Total loans | 336,989 | 355,684
Past Due More Than 90 days and Accruing | 149 |
Commercial and industrial | Total commercial and industrial | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 44 | 161
Commercial and industrial | Total commercial and industrial | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 35 |
Commercial and industrial | Total commercial and industrial | 90 Days or Greater Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 313 | 193
Residential mortgages | Total residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 4,217 | 14,889
Current | 913,084 | 980,327
Total loans | 917,301 | 995,216
Past Due More Than 90 days and Accruing | 105 |
Residential mortgages | Total residential real estate | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 414 | 9,178
Residential mortgages | Total residential real estate | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 1,007 | 2,511
Residential mortgages | Total residential real estate | 90 Days or Greater Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 2,796 | 3,200
Home equity |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 501 | 2,051
Current | 87,501 | 98,045
Total loans | 88,002 | 100,096
Past Due More Than 90 days and Accruing |  | 267
Home equity | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 344 | 1,062
Home equity | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 95 | 614
Home equity | 90 Days or Greater Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 62 | 375
Consumer other | Total consumer |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 34 | 22
Current | 9,535 | 10,130
Total loans | 9,569 | 10,152
Consumer other | Total consumer | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 32 | 20
Consumer other | Total consumer | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | $ 2 |
Consumer other | Total consumer | 90 Days or Greater Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due |  | $ 2

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