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Guarantees and Long Term Standby Purchase Commitments - Off-Balance Sheet Guaranteed Securities (Details) - Variable Interest Entity, Not Primary Beneficiary [Member] - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016
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Guarantor Obligations [Line Items] |  |  |
Guarantor Obligations, Maximum Exposure, Undiscounted |  | $ 1,805,820 | $ 1,802,631
Farm & Ranch [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Guarantor Obligations, Maximum Exposure, Undiscounted |  | 387,272 | 415,441
USDA Guarantees [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Guarantor Obligations, Maximum Exposure, Undiscounted |  | 135,334 | 103,976
Institutional Credit [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Guarantor Obligations, Maximum Exposure, Undiscounted |  | 983,214 | 983,214
Revolving Credit Facility [Member] | Institutional Credit [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Guarantor Obligations, Maximum Exposure, Undiscounted | [1] | $ 300,000 | $ 300,000
[1] | Relates to a revolving floating rate AgVantage facility subject to specified contractual terms. Farmer Mac receives a fixed fee based on the full dollar amount of the facility.

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- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
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