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SECURITIES AVAILABLE FOR SALE - Basis for Impairment Conclusion (Details) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 USD ($) security | Jan. 01, 2021 USD ($)
Investment Holdings [Line Items] |  |
Allowance on AFS debt securities | $ | $ 0 | $ 0
Accounting Standards Update 2016-13 |  |
Investment Holdings [Line Items] |  |
Allowance on AFS debt securities | $ | $ 0 |
US Government-sponsored enterprises |  |
Investment Holdings [Line Items] |  |
Available-for-sale, securities in unrealized loss positions (security) | 50 |
Available for sale securities portfolio, number of securities (security) | 556 |
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses (percentage) | 1.55% |
US Government agency |  |
Investment Holdings [Line Items] |  |
Available-for-sale, securities in unrealized loss positions (security) | 13 |
Available for sale securities portfolio, number of securities (security) | 158 |
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses (percentage) | 0.43% |
Private label |  |
Investment Holdings [Line Items] |  |
Available-for-sale, securities in unrealized loss positions (security) | 12 |
Available for sale securities portfolio, number of securities (security) | 29 |
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses (percentage) | 0.31% |
Obligations of states and political subdivisions thereof |  |
Investment Holdings [Line Items] |  |
Available-for-sale, securities in unrealized loss positions (security) | 16 |
Available for sale securities portfolio, number of securities (security) | 144 |
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses (percentage) | 0.65% |
Corporate bonds |  |
Investment Holdings [Line Items] |  |
Available-for-sale, securities in unrealized loss positions (security) | 8 |
Available for sale securities portfolio, number of securities (security) | 33 |
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses (percentage) | 0.97% |

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