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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Total Loans Rated Special Mention or Lower (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Total loans | $ 8,681,967 | $ 8,335,309
Total Criticized | Performing |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Total loans | 182,293 | 187,906
Total Classified | Performing |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Total loans | 126,542 | 119,779
Non-Accrual | Performing |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Total loans | 26,991 | 31,114
Substandard Accruing | Performing |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Total loans | 99,551 | 88,665
Special Mention | Performing |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |
Total loans | $ 55,751 | $ 68,127

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