FAIR VALUE DISCLOSURES - Schedule of Fair Value Measurements (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Assets:
Financial derivatives	$ 37,478	$ 37,409
Liabilities:
Financial derivatives	117,131	175,326
Investment securities
Assets:
Available-for-sale	4,918,931	$ 4,579,564
Farmer Mac Guaranteed Securities
Assets:
Available-for-sale	$ 5,532,479
Level 3
Liabilities:
Percent of level three fair value assets and liabilities	19.00%	28.00%
Financial instruments level three percent	52.00%	62.00%
Recurring
Assets:
Financial derivatives	$ 37,478	$ 37,409
Guarantee Asset	5,831	4,467
Total Assets at fair value	10,495,960	12,230,433
Liabilities:
Financial derivatives	117,131	175,326
Total Liabilities at fair value	117,131	175,326
Recurring \| USDA Securities:
Assets:
Trading	1,241	1,767
Recurring \| Investment securities
Assets:
Available-for-sale	4,918,931	4,579,564
Recurring \| Farmer Mac Guaranteed Securities
Assets:
Available-for-sale	5,532,479	7,607,226
Recurring \| Level 1
Assets:
Financial derivatives	11	0
Guarantee Asset	0	0
Total Assets at fair value	905,811	1,119,611
Liabilities:
Financial derivatives	91	142
Total Liabilities at fair value	91	142
Recurring \| Level 1 \| USDA Securities:
Assets:
Trading	0	0
Recurring \| Level 1 \| Investment securities
Assets:
Available-for-sale	905,800	1,119,611
Recurring \| Level 1 \| Farmer Mac Guaranteed Securities
Assets:
Available-for-sale	0	0
Recurring \| Level 2
Assets:
Financial derivatives	37,467	37,409
Guarantee Asset	0	0
Total Assets at fair value	4,031,516	3,478,335
Liabilities:
Financial derivatives	117,040	175,184
Total Liabilities at fair value	117,040	175,184
Recurring \| Level 2 \| USDA Securities:
Assets:
Trading	0	0
Recurring \| Level 2 \| Investment securities
Assets:
Available-for-sale	3,994,049	3,440,926
Recurring \| Level 2 \| Farmer Mac Guaranteed Securities
Assets:
Available-for-sale	0	0
Recurring \| Level 3
Assets:
Financial derivatives	0	0
Guarantee Asset	5,831	4,467
Total Assets at fair value	5,558,633	7,632,487
Liabilities:
Financial derivatives	0	0
Total Liabilities at fair value	0	0
Recurring \| Level 3 \| USDA Securities:
Assets:
Trading	1,241	1,767
Recurring \| Level 3 \| Investment securities
Assets:
Available-for-sale	19,082	19,027
Recurring \| Level 3 \| Farmer Mac Guaranteed Securities
Assets:
Available-for-sale	5,532,479	7,607,226
AgVantage \| Recurring \| Farmer Mac Guaranteed Securities
Assets:
Available-for-sale	5,522,712	7,599,379
AgVantage \| Recurring \| Level 1 \| Farmer Mac Guaranteed Securities
Assets:
Available-for-sale	0	0
AgVantage \| Recurring \| Level 2 \| Farmer Mac Guaranteed Securities
Assets:
Available-for-sale	0	0
AgVantage \| Recurring \| Level 3 \| Farmer Mac Guaranteed Securities
Assets:
Available-for-sale	5,522,712	7,599,379
Farmer Mac Guaranteed USDA Securities \| Recurring \| Farmer Mac Guaranteed Securities
Assets:
Available-for-sale	9,767	7,847
Farmer Mac Guaranteed USDA Securities \| Recurring \| Level 1 \| Farmer Mac Guaranteed Securities
Assets:
Available-for-sale	0	0
Farmer Mac Guaranteed USDA Securities \| Recurring \| Level 2 \| Farmer Mac Guaranteed Securities
Assets:
Available-for-sale	0	0
Farmer Mac Guaranteed USDA Securities \| Recurring \| Level 3 \| Farmer Mac Guaranteed Securities
Assets:
Available-for-sale	9,767	7,847
USDA Securities \| Recurring \| USDA Securities:
Assets:
Trading	1,241	1,767
USDA Securities \| Recurring \| Level 1 \| USDA Securities:
Assets:
Trading	0	0
USDA Securities \| Recurring \| Level 2 \| USDA Securities:
Assets:
Trading	0	0
USDA Securities \| Recurring \| Level 3 \| USDA Securities:
Assets:
Trading	1,241	1,767
Floating interest rate \| Floating rate auction-rate certificates backed by Government guaranteed student loans
Assets:
Available-for-sale	19,082	19,027
Floating interest rate \| Guaranteed mortgage-backed securities
Assets:
Available-for-sale	2,424,434	2,392,540
Floating interest rate \| Fixed rate U.S. Treasuries
Assets:
Available-for-sale	49,968
Floating interest rate \| Recurring \| Floating rate auction-rate certificates backed by Government guaranteed student loans
Assets:
Available-for-sale	19,082	19,027
Floating interest rate \| Recurring \| Guaranteed mortgage-backed securities
Assets:
Available-for-sale	2,424,434	2,392,540
Floating interest rate \| Recurring \| Floating rate U.S. Treasuries
Assets:
Available-for-sale	49,968
Floating interest rate \| Recurring \| Level 1 \| Floating rate auction-rate certificates backed by Government guaranteed student loans
Assets:
Available-for-sale	0	0
Floating interest rate \| Recurring \| Level 1 \| Guaranteed mortgage-backed securities
Assets:
Available-for-sale	0	0
Floating interest rate \| Recurring \| Level 1 \| Floating rate U.S. Treasuries
Assets:
Available-for-sale	49,968
Floating interest rate \| Recurring \| Level 2 \| Floating rate auction-rate certificates backed by Government guaranteed student loans
Assets:
Available-for-sale	0	0
Floating interest rate \| Recurring \| Level 2 \| Guaranteed mortgage-backed securities
Assets:
Available-for-sale	2,424,434	2,392,540
Floating interest rate \| Recurring \| Level 2 \| Floating rate U.S. Treasuries
Assets:
Available-for-sale	0
Floating interest rate \| Recurring \| Level 3 \| Floating rate auction-rate certificates backed by Government guaranteed student loans
Assets:
Available-for-sale	19,082	19,027
Floating interest rate \| Recurring \| Level 3 \| Guaranteed mortgage-backed securities
Assets:
Available-for-sale	0	0
Floating interest rate \| Recurring \| Level 3 \| Floating rate U.S. Treasuries
Assets:
Available-for-sale	0
Fixed Interest Rate \| Guaranteed mortgage-backed securities
Assets:
Available-for-sale	1,569,615	1,048,386
Fixed Interest Rate \| Fixed rate U.S. Treasuries
Assets:
Available-for-sale	855,832	1,119,611
Fixed Interest Rate \| Recurring \| Guaranteed mortgage-backed securities
Assets:
Available-for-sale	1,569,615	1,048,386
Fixed Interest Rate \| Recurring \| Fixed rate U.S. Treasuries
Assets:
Available-for-sale	855,832	1,119,611
Fixed Interest Rate \| Recurring \| Level 1 \| Guaranteed mortgage-backed securities
Assets:
Available-for-sale	0	0
Fixed Interest Rate \| Recurring \| Level 1 \| Fixed rate U.S. Treasuries
Assets:
Available-for-sale	855,832	1,119,611
Fixed Interest Rate \| Recurring \| Level 2 \| Guaranteed mortgage-backed securities
Assets:
Available-for-sale	1,569,615	1,048,386
Fixed Interest Rate \| Recurring \| Level 2 \| Fixed rate U.S. Treasuries
Assets:
Available-for-sale	0	0
Fixed Interest Rate \| Recurring \| Level 3 \| Guaranteed mortgage-backed securities
Assets:
Available-for-sale	0	0
Fixed Interest Rate \| Recurring \| Level 3 \| Fixed rate U.S. Treasuries
Assets:
Available-for-sale	$ 0	$ 0

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