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Guarantees and Long Term Standby Purchase Commitments - Cash Flows from Off-balance sheet Guaranteed Securities (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Dec. 31, 2016
Guarantor Obligations [Line Items] |  |  |
Proceeds from sale of Farmer Mac Guaranteed Securities | $ 149,607 | $ 139,561 |
Proceeds from Fees Received | 488 | 561 |
Payments to Acquire Loans and Leases Held-for-investment | 0 | $ (1,267) |
Variable Interest Entity, Not Primary Beneficiary [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Guarantor Obligations, Maximum Exposure, Undiscounted | $ 1,805,820 |  | $ 1,802,631
Farmer Mac Guaranteed Securities [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Weighted average remaining maturity, Loans underlying guarantees not held by transferor | 10 years 7 months 18 days |  | 10 years 8 months 18 days
Farmer Mac Guaranteed Securities [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Guarantor Obligations, Current Carrying Value | $ 4,700 |  | $ 5,500
Institutional Credit [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Guarantor Obligations, Maximum Exposure, Undiscounted | $ 983,214 |  | $ 983,214
Institutional Credit [Member] | Farmer Mac Guaranteed Securities [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Weighted average remaining maturity, Loans underlying guarantees not held by transferor | 5 months 8 days |  | 8 months 8 days

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
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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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