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Farmer Mac Guaranteed Securities and USDA Securities - Schedule of Held-to-maturity Securities (Details) - Farmer Mac Guaranteed Securities and USDA Securities [Member] - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Amortized Cost |  |
Due within one year | $ 539,516 |
Due after one year through five years | 1,094,543 |
Due after five years through ten years | 203,660 |
Due after ten years | 1,869,834 |
Amortized Cost | 3,707,553 | $ 4,262,792
Fair Value |  |
Due within one year | 538,274 |
Due after one year through five years | 1,108,105 |
Due after five years through ten years | 203,644 |
Due after ten years | 1,874,851 |
Total | $ 3,724,874 | $ 4,191,352
Weighted- Average Yield |  |
Due within one year | 2.24% |
Due after one year through five years | 3.32% |
Due after five years through ten years | 3.48% |
Due after ten years | 3.63% |
Total | 3.33% |

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