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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Non Traditional Mortgage Loans Additional Information (Details)	Sep. 30, 2021 portfolio_product
NTM Loans | Interest-only
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of interest-only products	3

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- Definition

Financial Instruments, Number of Products

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Details

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