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Borrowings - Farmer Mac Facility Narrative (Details) | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2021 USD ($) bond | Nov. 10, 2021 USD ($) | Feb. 04, 2021 USD ($) | Dec. 10, 2020 USD ($) | Dec. 05, 2014 USD ($)
Debt Instrument [Line Items] |  |  |  |  |
Number of bonds issued | bond | 2 |  |  |  |
Debt instrument, loans to value ratios | 60.00% |  |  |  |
Farmer Mac Facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Amount | $ | $ 96,400,000 | $ 1,290,000 | $ 2,460,000 | $ 225,000,000 | $ 125,000,000
Debt instrument, loans to value ratios | 60.00% |  |  |  |

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