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INVESTMENT SECURITIES - Proceeds from Sales of AFS Securities and Gross Gains and Gross Losses (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract] |  |  |
Proceeds from sale of investment securities | $ 0 | $ 59,464 |
Gross gains | 0 | 519 |
Gross losses | 40 | 180 |
Debt Securities, Available-for-sale [Line Items] |  |  |
Loss on investment | (40) |  |
Gain on investments |  | $ 339 |
Collateral Pledged |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
AFS securities pledged to secure public funds, fair value | $ 377,000 |  | $ 158,700

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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=118939692&loc=d3e27357-111563 + Details
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