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INVESTMENT SECURITIES - Investments Sold (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Proceeds from Sale and Maturity of Debt Securities, Available-for-sale [Abstract] |  |
Proceeds from Sale of Debt Securities, Available-for-sale | $ 16,800 | $ 32,300
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract] |  |
Debt Securities, Available-for-sale, Realized Gain | $ 6 |

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- Definition Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27357-111563 + Details
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