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Borrowings - Farmer Mac Facility (Detail) | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2020 USD ($) debt_instrument | Dec. 11, 2020 USD ($) | Dec. 10, 2020 USD ($) | Jan. 10, 2020 USD ($) | Dec. 05, 2014 USD ($)
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, loans to value ratios percentage | 60.00% |  |  |  |
Farmer Mac Facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, face amount |  |  | $ 225,000,000.0 | $ 8,100,000 | $ 125,000,000.0
Number of debt instruments issued | debt_instrument | 3 |  |  |  |
Bonds repaid | $ 22,000,000.0 |  |  |  |
Interest rate (as percent) |  |  |  | 2.66% |
Debt instrument, loans to value ratios percentage | 60.00% |  |  |  |
Farmer Mac Facility | Lease One |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, face amount |  | $ 3,180,000 |  |  |
Interest rate (as percent) |  | 2.13% |  |  |
Farmer Mac Facility | Lease Two |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, face amount |  | $ 10,673,000 |  |  |
Interest rate (as percent) |  | 3.25% |  |  |

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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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