GUARANTEES AND COMMITMENTS - Unpaid Principal Balances by Delinquency Status (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Guarantor Obligations [Line Items]
Total Loans	$ 10,041,653	$ 9,623,119
Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	3,820,746	3,932,857
Current
Guarantor Obligations [Line Items]
Total Loans	12,021,148	11,264,691
Current | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	3,794,885	3,925,931
Total Past Due
Guarantor Obligations [Line Items]
Total Loans	47,579	30,270
Total Past Due | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	25,861	6,926
30-59 Days
Guarantor Obligations [Line Items]
Total Loans	21,101	15,326
30-59 Days | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	21,286	2,776
60-89 Days
Guarantor Obligations [Line Items]
Total Loans	6,711	3,953
60-89 Days | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	303	2,366
90 Days and Greater
Guarantor Obligations [Line Items]
Total Loans	19,767	10,991
90 Days and Greater | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	4,272	1,784
Agricultural Finance | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	3,223,053	3,397,844
Agricultural Finance | Current
Guarantor Obligations [Line Items]
Total Loans	8,041,910	7,729,928
Agricultural Finance | Current | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	3,197,192	3,390,918
Agricultural Finance | Total Past Due
Guarantor Obligations [Line Items]
Total Loans	47,579	30,270
Agricultural Finance | Total Past Due | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	25,861	6,926
Agricultural Finance | 30-59 Days
Guarantor Obligations [Line Items]
Total Loans	21,101	15,326
Agricultural Finance | 30-59 Days | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	21,286	2,776
Agricultural Finance | 60-89 Days
Guarantor Obligations [Line Items]
Total Loans	6,711	3,953
Agricultural Finance | 60-89 Days | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	303	2,366
Agricultural Finance | 90 Days and Greater
Guarantor Obligations [Line Items]
Total Loans	19,767	10,991
Agricultural Finance | 90 Days and Greater | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	4,272	1,784
Rural Infrastructure Finance
Guarantor Obligations [Line Items]
Total Loans	3,979,238	3,534,763
Rural Infrastructure Finance | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	597,693	535,013
Rural Infrastructure Finance | Current
Guarantor Obligations [Line Items]
Total Loans	3,979,238	3,534,763
Rural Infrastructure Finance | Current | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	597,693	535,013
Rural Infrastructure Finance | Total Past Due
Guarantor Obligations [Line Items]
Total Loans	0	0
Rural Infrastructure Finance | Total Past Due | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	0	0
Rural Infrastructure Finance | 30-59 Days
Guarantor Obligations [Line Items]
Total Loans	0	0
Rural Infrastructure Finance | 30-59 Days | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	0	0
Rural Infrastructure Finance | 60-89 Days
Guarantor Obligations [Line Items]
Total Loans	0	0
Rural Infrastructure Finance | 60-89 Days | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	0	0
Rural Infrastructure Finance | 90 Days and Greater
Guarantor Obligations [Line Items]
Total Loans	0	0
Rural Infrastructure Finance | 90 Days and Greater | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	$ 0	$ 0