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INVESTMENT SECURITIES - Pledged Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Debt Securities, Available-for-sale, Restricted [Abstract] |  |
Debt Securities, Available-for-sale, Restricted | $ 0 | $ 0
Debt Securities, Available-for-sale, Restriction Type | us-gaap:AssetPledgedAsCollateralMember | us-gaap:AssetPledgedAsCollateralMember

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- Definition Amount of restricted 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 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (b)(1)(i) -URI http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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- Definition Indicates type of restriction 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 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
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