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SECURITIES AVAILABLE FOR SALE - Narrative (Details)
12 Months Ended
Dec. 31, 2019
USD ($)
security
US Government-sponsored enterprises  
Investment Holdings [Line Items]  
Available-for-sale, securities in unrealized loss positions 163
Available for sale securities portfolio, number of securities (security) 684
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses percentage 2.30%
US Government agency  
Investment Holdings [Line Items]  
Available-for-sale, securities in unrealized loss positions 49
Available for sale securities portfolio, number of securities (security) 182
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses percentage 1.90%
Private label  
Investment Holdings [Line Items]  
Available-for-sale, securities in unrealized loss positions 9
Available for sale securities portfolio, number of securities (security) 19
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses percentage 3.70%
Obligations of states and political subdivisions thereof  
Investment Holdings [Line Items]  
Available-for-sale, securities in unrealized loss positions 15
Available for sale securities portfolio, number of securities (security) 217
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses percentage 0.90%
Material underlying credit downgrades | $ $ 0
Corporate bonds  
Investment Holdings [Line Items]  
Available-for-sale, securities in unrealized loss positions 7
Available for sale securities portfolio, number of securities (security) 27
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses percentage 1.10%