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LOANS AND ALLOWANCE FOR LOAN LOSSES - PPP Loans and CARES Act Deferrals (Details) $ in Thousands | Dec. 31, 2021 USD ($) loan | Dec. 31, 2020 USD ($) loan
--- | --- | ---
Financing Receivable, Impaired [Line Items] |  |
Loan balance | $ 1,871,447 | $ 1,454,801
Commercial |  |
Financing Receivable, Impaired [Line Items] |  |
Loan balance | 1,480,527 | 1,141,114
Loans approved for modification |  | 34,700
Consumer |  |
Financing Receivable, Impaired [Line Items] |  |
Loan balance | 43,919 | 3,156
Loans approved for modification | $ 10,800 | $ 13,500
SBA PPP |  |
Financing Receivable, Impaired [Line Items] |  |
Number of loans | loan | 4,465 | 455
Original balance of loans | $ 268,100 | $ 92,800
Loan balance | $ 131,700 | $ 82,000

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