FARMER MAC GUARANTEED SECURITIES AND USDA SECURITIES - Schedule of On-Balance Sheet Securities (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2025	Dec. 31, 2024
Trading:
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Accrued interest receivable (includes $16,524 and $28,563, respectively, related to consolidated trusts)	Accrued interest receivable (includes $16,524 and $28,563, respectively, related to consolidated trusts)
Farmer Mac Guaranteed Securities
Held-to-maturity:
Unpaid Principal Balance	$ 2,477,866	$ 2,744,767
Amortized cost	2,451,569	2,717,866
Allowance for losses	(162)	(178)
Unrealized Gains	10,311	6,224
Unrealized Losses	(15,503)	(22,812)
Fair Value	2,446,215	2,701,100
Available-for-sale:
Amortized cost	5,859,630
Fair Value	5,623,384
USDA Securities
Held-to-maturity:
Unpaid Principal Balance	2,358,530	2,351,334
Amortized cost	2,376,690	2,370,534
Allowance for losses	0	0
Unrealized Gains	4,824	180
Unrealized Losses	(210,102)	(258,190)
Fair Value	2,171,412	2,112,524
Trading:
Unpaid Principal Balance	645	814
Amortized Cost	681	856
Allowance for losses	0	0
Unrealized Gains	0	0
Unrealized Losses	(30)	(38)
Fair Value	$ 651	$ 818
Trading securities, weighted-average yield	5.68%	5.47%
Farmer Mac Guaranteed Securities and USDA Securities
Held-to-maturity:
Unpaid Principal Balance	$ 4,836,396	$ 5,096,101
Amortized cost	4,828,259	5,088,400
Allowance for losses	(162)	(178)
Unrealized Gains	15,135	6,404
Unrealized Losses	(225,605)	(281,002)
Fair Value	4,617,627	4,813,624
Farmer Mac Guaranteed Securities
Held-to-maturity:
Amortized cost	2,451,407	2,717,688
Available-for-sale:
Unpaid Principal Balance	5,851,094	5,826,948
Amortized cost	5,859,630	5,835,658
Allowance for losses	(186)	(236)
Unrealized Gains	16,736	6,600
Unrealized Losses	(252,796)	(327,476)
Fair Value	5,623,384	5,514,546
Held-to-Maturity Securities \| Farmer Mac Guaranteed Securities
Held-to-maturity:
Unamortized Premium/(Discount)	(26,297)	(26,901)
Available-for-sale:
Unamortized Premium/(Discount)	(26,297)	(26,901)
Trading:
Unamortized Premium/(Discount)	(26,297)	(26,901)
Held-to-Maturity Securities \| USDA Securities
Held-to-maturity:
Unamortized Premium/(Discount)	18,160	19,200
Available-for-sale:
Unamortized Premium/(Discount)	18,160	19,200
Trading:
Unamortized Premium/(Discount)	18,160	19,200
Held-to-Maturity Securities \| Farmer Mac Guaranteed Securities and USDA Securities
Held-to-maturity:
Unamortized Premium/(Discount)	(8,137)	(7,701)
Available-for-sale:
Unamortized Premium/(Discount)	(8,137)	(7,701)
Trading:
Unamortized Premium/(Discount)	(8,137)	(7,701)
Available-for-Sale Securities \| Farmer Mac Guaranteed Securities
Held-to-maturity:
Unamortized Premium/(Discount)	8,536	8,710
Available-for-sale:
Unamortized Premium/(Discount)	8,536	8,710
Trading:
Unamortized Premium/(Discount)	8,536	8,710
Trading Securities \| USDA Securities
Held-to-maturity:
Unamortized Premium/(Discount)	36	42
Available-for-sale:
Unamortized Premium/(Discount)	36	42
Trading:
Unamortized Premium/(Discount)	36	42
Farmer Mac Guaranteed Securities \| Farmer Mac Guaranteed Securities
Available-for-sale:
Fair Value	8,900	9,000
Trading:
Derivative, notional amount	222,100	228,000
Farmer Mac Guaranteed Securities \| Farmer Mac Guaranteed Securities
Available-for-sale:
Unpaid Principal Balance	0	0
Amortized cost	8,536	8,710
Allowance for losses	0	0
Unrealized Gains	336	305
Unrealized Losses	0	0
Fair Value	8,872	9,015
Farmer Mac Guaranteed Securities \| Available-for-Sale Securities \| Farmer Mac Guaranteed Securities
Held-to-maturity:
Unamortized Premium/(Discount)	8,536	8,710
Available-for-sale:
Unamortized Premium/(Discount)	8,536	8,710
Trading:
Unamortized Premium/(Discount)	8,536	8,710
AgVantage
Trading:
Available-for-sale, accrued interest excluded	59,300	57,500
Held-to-maturity, accrued interest excluded	47,700	59,800
AgVantage \| Farmer Mac Guaranteed Securities
Held-to-maturity:
Unpaid Principal Balance	2,428,184	2,694,492
Amortized cost	2,401,862	2,667,564
Allowance for losses	(162)	(178)
Unrealized Gains	9,967	5,978
Unrealized Losses	(14,490)	(21,592)
Fair Value	2,397,177	2,651,772
AgVantage \| Farmer Mac Guaranteed Securities
Available-for-sale:
Unpaid Principal Balance	5,851,094	5,826,948
Amortized cost	5,851,094	5,826,948
Allowance for losses	(186)	(236)
Unrealized Gains	16,400	6,295
Unrealized Losses	(252,796)	(327,476)
Fair Value	5,614,512	5,505,531
AgVantage \| Held-to-Maturity Securities \| Farmer Mac Guaranteed Securities
Held-to-maturity:
Unamortized Premium/(Discount)	(26,322)	(26,928)
Available-for-sale:
Unamortized Premium/(Discount)	(26,322)	(26,928)
Trading:
Unamortized Premium/(Discount)	(26,322)	(26,928)
AgVantage \| Available-for-Sale Securities \| Farmer Mac Guaranteed Securities
Held-to-maturity:
Unamortized Premium/(Discount)	0	0
Available-for-sale:
Unamortized Premium/(Discount)	0	0
Trading:
Unamortized Premium/(Discount)	0	0
Farmer Mac Guaranteed USDA Securities \| Farmer Mac Guaranteed Securities
Held-to-maturity:
Unpaid Principal Balance	49,682	50,275
Amortized cost	49,707	50,302
Allowance for losses	0	0
Unrealized Gains	344	246
Unrealized Losses	(1,013)	(1,220)
Fair Value	49,038	49,328
Farmer Mac Guaranteed USDA Securities \| Held-to-Maturity Securities \| Farmer Mac Guaranteed Securities
Held-to-maturity:
Unamortized Premium/(Discount)	25	27
Available-for-sale:
Unamortized Premium/(Discount)	25	27
Trading:
Unamortized Premium/(Discount)	$ 25	$ 27

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