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INVESTMENT SECURITIES - Narrative (Details) | 6 Months Ended
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Jun. 30, 2022 position
Financing Receivable, Credit Quality Indicator [Line Items] |
Maximum individual state general bond obligation as a percentage of total debt securities (percent) | 1.00%
Securities in unrealized loss positions, number of positions | 1,500
Securities, number of positions | 1,830
S&P AA- rating |
Financing Receivable, Credit Quality Indicator [Line Items] |
Percentage of debt securities considered to be of investment-grade (percent) | 96.00%

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