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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Total Loans Rated Special Mention or Lower (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
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Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Total loans | $ 9,212,322 | $ 9,039,686
Total Criticized | Performing |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Total loans | 231,631 | 244,598
Total Classified | Performing |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Total loans | 126,799 | 153,096
Non-Accrual | Performing |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Total loans | 23,969 | 21,407
Substandard Accruing | Performing |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Total loans | 102,830 | 131,689
Special Mention | Performing |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Total loans | $ 104,832 | $ 91,502

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