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SECURITIES, Held-to-Maturity Securities with Unrealized Losses in Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Held-to-maturity Securities with Continuous Unrealized Loss Position, Fair Value [Abstract] |  |  |
Less Than 12 Months - Fair Value |  |  | $ 2,023
12 Months or More - Fair Value |  |  | 0
Fair Value |  |  | 2,023
Held-to-maturity Securities with Unrealized Loss Position, Unrealized Loss [Abstract] |  |  |
Less Than 12 Months - Unrecognized Loss |  |  | (36)
12 Months or More - Unrecognized Loss |  |  | 0
Unrecognized Loss |  |  | (36)
Unrealized Losses and Other-than-temporary Impairment [Abstract] |  |  |
Proceeds from sale of investment securities | $ 0 | $ 0 |
Other than temporary impairment losses | $ 0 |  | 0
Obligations of States and Political Subdivisions [Member] |  |  |
Held-to-maturity Securities with Continuous Unrealized Loss Position, Fair Value [Abstract] |  |  |
Less Than 12 Months - Fair Value |  |  | 2,023
12 Months or More - Fair Value |  |  | 0
Fair Value |  |  | 2,023
Held-to-maturity Securities with Unrealized Loss Position, Unrealized Loss [Abstract] |  |  |
Less Than 12 Months - Unrecognized Loss |  |  | (36)
12 Months or More - Unrecognized Loss |  |  | 0
Unrecognized Loss |  |  | $ (36)

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- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in continuous loss position for 12 months or longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in unrealized loss position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
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- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity), in unrealized loss position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27290-111563 + Details
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in continuous loss position for less than 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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://fasb.org/us-gaap/role/ref/legacyRef -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 The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 8A -URI http://asc.fasb.org/extlink&oid=121553693&loc=SL6284422-111562 + Details
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