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Guarantees and Long-Term Standby Purchase Commitments - Cash Flows from Off-balance sheet Guaranteed Securities (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Guarantor Obligations [Line Items] |  |  |
Proceeds from new securitizations | $ 199,396 | $ 305,391 |
Guarantee fees received | $ 1,122 | $ 1,481 |
Farmer Mac Guaranteed Securities [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Weighted average remaining maturity, loans underlying guarantees not held by transferor | 9 years 10 months 24 days |  | 10 years 3 months 18 days
Farmer Mac Guaranteed Securities [Member] | Unconsolidated VIEs [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Guarantor obligation, liability | $ 2,400 |  | $ 2,800
Institutional Credit [Member] | Farmer Mac Guaranteed Securities [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Weighted average remaining maturity, loans underlying guarantees not held by transferor | 2 years 4 months 24 days |  | 5 years

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- Definition The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=115931803&loc=d3e12069-110248 + Details
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