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SECURITIES - Schedule of Available For Sale of Securities Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Securities with unrealized losses [Abstract] |  |  |
Less than 12 months, Fair Value | $ 262,713 | $ 26,724 |
12 months or more, Fair value |  | 3,112 |
Total Fair value | 262,713 | 29,836 |
Less than 12 Months, Unrealized Losses | 6,491 | 89 |
12 Months or more, Unrealized Losses |  | 17 |
Total Unrealized Losses | 6,491 | 106 |
U.S. government sponsored agencies |  |  |
Securities with unrealized losses [Abstract] |  |  |
Less than 12 months, Fair Value | 34,890 | 19,800 |
12 months or more, Fair value | 0 | 0 |
Total Fair value | 34,890 | 19,800 |
Less than 12 Months, Unrealized Losses | 1,260 | 61 |
12 Months or more, Unrealized Losses | 0 | 0 |
Total Unrealized Losses | 1,260 | 61 |
Mortgage-backed securities residential [Member] |  |  |
Securities with unrealized losses [Abstract] |  |  |
Less than 12 months, Fair Value | 161,631 | 3 |
12 months or more, Fair value | 0 | 3,112 |
Total Fair value | 161,631 | 3,115 |
Less than 12 Months, Unrealized Losses | 4,239 | 0 |
12 Months or more, Unrealized Losses | 0 | 17 |
Total Unrealized Losses | 4,239 | 17 |
Mortgage-backed securities commercial [Member] |  |  |
Securities with unrealized losses [Abstract] |  |  |
Less than 12 months, Fair Value | 2,567 | 0 |
12 months or more, Fair value | 0 | 0 |
Total Fair value | 2,567 | 0 |
Less than 12 Months, Unrealized Losses | 2 | 0 |
12 Months or more, Unrealized Losses | 0 | 0 |
Total Unrealized Losses | 2 | $ 0 |
State and Municipal Securities [Member] |  |  |
Securities with unrealized losses [Abstract] |  |  |
Less than 12 months, Fair Value | 63,625 |  | $ 6,921
12 months or more, Fair value | 0 |  | 0
Total Fair value | 63,625 |  | 6,921
Less than 12 Months, Unrealized Losses | 990 |  | 28
12 Months or more, Unrealized Losses | 0 |  | 0
Total Unrealized Losses | $ 990 |  | $ 28

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- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months. + References No definition available. + Details
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121582814&loc=SL82922890-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27337-111563 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 + Details
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121582814&loc=SL82922890-210455 + Details
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121582814&loc=SL82922890-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27337-111563 + Details
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=121582814&loc=SL82922888-210455 + Details
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