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INVESTMENTS - Additional Information (Details) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2019
Gain (Loss) on Securities [Line Items] |  |  |
Realized gain (loss) on debt securities transferred from HTM to AFS |  | $ 200 |
NumberOfSecuritiesInSecurityPortfolio | 1,276 |  | 1,273
NumberOfSecuritiesInUnrealizedLossPosition | 194 |  | 140
Proceeds from Sale of Debt Securities, Available-for-sale | $ 29,900 | 0 |
Available-for-sale Securities, Gross Realized Gains | 0 | 0 |
Available-for-sale Securities, Gross Realized Losses | $ 100 | 0 |
Debt Securities, Held-to-maturity, Transfer, Amount |  | $ 268,700 |

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- Definition Amount of investment in debt security, measured at amortized cost, transferred to investment in debt security, measured at fair value, with change in fair value recognized in other comprehensive income (available-for-sale) and net income (trading). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27405-111563 + Details
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