FAIR VALUE DISCLOSURES - Summary of Carrying Value and Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financial assets:
Financial derivatives	$ 31,433	$ 37,478
Guarantee and commitment fees receivable	48,130	49,832
Financial liabilities:
Financial derivatives	128,530	117,131
Guarantee and commitment obligation	45,866	47,563
Fair Value
Financial assets:
Cash and cash equivalents	745,105	888,707
Loans	10,632,530	10,426,021
Financial derivatives	31,433	37,478
Guarantee and commitment fees receivable	55,856	58,465
Financial liabilities:
Notes payable	25,825,161	25,670,971
Debt securities of consolidated trusts held by third parties	1,244,879	1,268,563
Financial derivatives	128,530	117,131
Guarantee and commitment obligation	53,591	56,195
Fair Value | Investment Securities
Financial assets:
Marketable securities	5,069,547	4,981,249
Fair Value | Farmer Mac Guaranteed Securities
Financial assets:
Marketable securities	9,889,495	9,710,074
Fair Value | USDA Securities
Financial assets:
Marketable securities	2,016,076	2,036,046
Carrying Amount
Financial assets:
Cash and cash equivalents	745,105	888,707
Loans	11,233,071	11,039,349
Financial derivatives	31,433	37,478
Guarantee and commitment fees receivable	48,130	49,832
Financial liabilities:
Notes payable	26,509,011	26,336,542
Debt securities of consolidated trusts held by third parties	1,325,289	1,351,069
Financial derivatives	128,530	117,131
Guarantee and commitment obligation	45,866	47,563
Carrying Amount | Investment Securities
Financial assets:
Marketable securities	5,068,443	4,979,504
Carrying Amount | Farmer Mac Guaranteed Securities
Financial assets:
Marketable securities	9,921,620	9,745,548
Carrying Amount | USDA Securities
Financial assets:
Marketable securities	$ 2,334,093	$ 2,355,412