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Financial Derivatives - Hedged Items in Fair Value Hedging Relationships (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Loans |  |
HedgedItemsinFairValueHedgingRelationship [Line Items] |  |
Carrying Amount of Hedged Assets/(Liabilities) | $ 1,692,609 | $ 1,050,335
Hedged Asset | 111,333 | 37,907
Loans | No hedge designation |  |
HedgedItemsinFairValueHedgingRelationship [Line Items] |  |
Hedged Asset | 1,400 |
Long-term Debt |  |
HedgedItemsinFairValueHedgingRelationship [Line Items] |  |
Carrying Amount of Hedged Assets/(Liabilities) | (3,006,140) | (2,761,052)
Hedged Liability | (53,240) | (7,433)
Farmer Mac Guaranteed Securities |  |
HedgedItemsinFairValueHedgingRelationship [Line Items] |  |
Carrying Amount of Hedged Assets/(Liabilities) | 4,244,027 | 4,092,611
Hedged Asset | 382,825 | $ 180,215
Farmer Mac Guaranteed Securities | No hedge designation |  |
HedgedItemsinFairValueHedgingRelationship [Line Items] |  |
Hedged Asset | $ 1,600 |

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- Definition Amount of cumulative increase (decrease) in fair value of hedged asset in fair value hedge, attributable to hedged risk. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4EE -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL109999712-113959 + Details
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- Definition Amount of cumulative increase (decrease) in fair value of hedged liability in fair value hedge, attributable to hedged risk. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4EE -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL109999712-113959 + Details
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