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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Total Loans Rated Special Mention or Lower (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
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Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Total loans | $ 8,882,402 | $ 8,335,309
Total Criticized | Performing |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Total loans | 231,033 | 187,906
Total Classified | Performing |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Total loans | 131,715 | 119,779
Non-Accrual | Performing |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Total loans | 28,388 | 31,114
Substandard Accruing | Performing |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Total loans | 103,327 | 88,665
Special Mention | Performing |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Total loans | $ 99,318 | $ 68,127

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