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Farmer Mac Guaranteed Securities and USDA Securities - Unrealized Loss Position (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
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Unrealized loss position for less than 12 months |  |
Unrealized loss position for less than 12 months, Fair Value | $ 421,167 | $ 537,162
Unrealized loss position for less than 12 months, Unrealized Loss | (483) | (636)
Unrealized loss position for more than 12 months |  |
Unrealized loss position for more than 12 months, Fair Value | 313,022 | 349,825
Unrealized loss position for more than 12 months, Unrealized Loss | (2,996) | (2,944)
Farmer Mac Guaranteed Securities and USDA Securities |  |
Unrealized loss position for less than 12 months |  |
Fair Value | 269,871 | 49,939
Unrealized Loss | (5,129) | (61)
Unrealized loss position for more than 12 months |  |
Fair Value | 18,024 | 21,061
Unrealized Loss | (397) | (560)
AgVantage Securities | Farmer Mac Guaranteed Securities |  |
Unrealized loss position for less than 12 months |  |
Fair Value | 269,871 | 49,939
Unrealized Loss | (5,129) | (61)
Unrealized loss position for more than 12 months |  |
Fair Value | 0 | 0
Unrealized Loss | 0 | 0
Unrealized loss position for less than 12 months |  |
Unrealized loss position for less than 12 months, Fair Value | 225,079 | 133,703
Unrealized loss position for less than 12 months, Unrealized Loss | (8,801) | (231)
Unrealized loss position for more than 12 months |  |
Unrealized loss position for more than 12 months, Fair Value | 204,183 | 981,757
Unrealized loss position for more than 12 months, Unrealized Loss | (817) | (15,007)
USDA Securities | Farmer Mac Guaranteed Securities |  |
Unrealized loss position for less than 12 months |  |
Fair Value | 0 | 0
Unrealized Loss | 0 | 0
Unrealized loss position for more than 12 months |  |
Fair Value | 0 | 0
Unrealized Loss | 0 | 0
USDA Securities | USDA Securities: |  |
Unrealized loss position for less than 12 months |  |
Fair Value | 0 | 0
Unrealized Loss | 0 | 0
Unrealized loss position for more than 12 months |  |
Fair Value | 18,024 | 21,061
Unrealized Loss | $ (397) | $ (560)

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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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