Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2023

Accounting Policies [Abstract]

Earnings Per Common Share

Earnings Per Common ShareBasic earnings per common share ("EPS") is based on the daily weighted-average number of shares of common stock outstanding. Diluted earnings per common share is based on the daily weighted-average number of shares of common stock outstanding adjusted to include all potentially dilutive stock appreciation rights ("SARs") and unvested restricted stock awards.

Comprehensive Income

Comprehensive IncomeComprehensive income represents all changes in stockholders' equity except those resulting from investments by or distributions to stockholders, and is comprised of net income and unrealized gains and losses on available-for-sale securities, certain held-to-maturity securities transferred from the available-for-sale classification, and cash flow hedges, net of related taxes.

New Accounting Standards

New Accounting StandardsRecently Adopted Accounting Guidance

Standard	Description	Date of Adoption	Effect on Consolidated Financial Statements
ASU 2020-04 and 2021-01, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting	The amendments in this Update provide optional guidance for a limited period of time to ease the potential burden in accounting for reference rate reform on financial reporting. They provide optional expedients and exceptions for applying GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met.	January 1, 2020	During the second quarter 2023, Farmer Mac adopted optional expedients including those relating to qualifying hedging relationships and contract modification relief, and as of June 30, 2023, has no further variable-rate exposure to LIBOR. To date, these elections did not have a material effect on Farmer Mac's financial position, results of operations, or cash flows. Farmer Mac does not expect to elect further expedients through the ending date of December 31, 2024.
ASU 2022-06, Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848	The amendments in this Update deferred the sunset date in Topic 848 from December 31, 2022 to December 31, 2024.	December 21, 2022	Farmer Mac does not expect to elect further expedients through the ending date of December 31, 2024.
ASU 2022-02, Financial Instruments-Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures	The Update addresses and amends areas identified by the Financial Accounting Standards Board as part of its post-implementation review of the accounting standard that introduced the current expected credit losses (“CECL”) model. The amendments eliminate the accounting guidance for troubled debt restructurings by creditors that have adopted the CECL model and enhance the disclosure requirements for loan refinancings and restructurings made with borrowers experiencing financial difficulty. In addition, the amendments require disclosure of current-period gross write offs for financing receivables and net investment in leases by year of origination in the vintage disclosures.	January 1, 2023	The adoption of this Update did not have a material effect on Farmer Mac's financial position, results of operations, or cash flows.
ASU 2022-01, Fair Value Hedging - Portfolio Layer Method	The Update introduces the portfolio layer method, which expands the current single-layer method to allow multiple hedged layers of a single closed portfolio under the method (previously named, last-of-layer method). Additionally, it expands the scope of the portfolio layer method to include non-prepayable assets, specifies eligible hedging instruments in a single-layer hedge, provides additional guidance on the accounting for and disclosure of hedge basis adjustments under the portfolio layer method, specifies how hedge basis adjustments should be considered when determining credit losses for the assets included in the closed portfolio, and provides that an entity may reclassify HTM debt securities identified within 30 days of the date of adoption to AFS if the entity applies portfolio layer method hedging to those debt securities.	January 1, 2023	Farmer Mac adopted this guidance as of January 1, 2023. Farmer Mac does not currently hedge interest rate risk for single closed portfolios of financial assets, so adoption of this guidance had no effect on Farmer Mac's financial condition, results of operations, cash flows, or disclosures given current strategies.

Reclassifications

ReclassificationsCertain reclassifications of prior period information were made to conform to the current period presentation. The reclassifications of prior period information were not material to the consolidated financial statements.