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GUARANTEES AND COMMITMENTS - Schedule of Underlying Off-Balance Sheet Guaranteed Securities (Details) - Farmer Mac Guaranteed USDA Securities - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Mar. 31, 2024 | Dec. 31, 2023
Guarantor Obligations [Line Items] |  |
Guarantee and commitment obligation | $ 5,808 | $ 5,969
Weighted-average remaining maturity | 21 years 7 months 6 days | 21 years 10 months 24 days

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