GUARANTEES AND COMMITMENTS - Unpaid Principal Balances by Delinquency Status (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Guarantor Obligations [Line Items]
Total Loans	$ 12,226,915	$ 11,183,408
Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	4,634,352	4,267,519
Current
Guarantor Obligations [Line Items]
Total Loans	14,618,663	13,410,152
Current | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	4,611,368	4,257,137
Total Past Due
Guarantor Obligations [Line Items]
Total Loans	42,948	30,105
Total Past Due | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	22,984	10,382
30-59 Days
Guarantor Obligations [Line Items]
Total Loans	19,491	16,478
30-59 Days | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	10,608	1,421
60-89 Days
Guarantor Obligations [Line Items]
Total Loans	18,763	7,268
60-89 Days | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	9,901	1,358
90 Days and Greater
Guarantor Obligations [Line Items]
Total Loans	4,694	6,359
90 Days and Greater | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	2,475	7,603
Agricultural Finance | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	3,480,026	3,534,788
Agricultural Finance | Current
Guarantor Obligations [Line Items]
Total Loans	9,134,007	8,635,669
Agricultural Finance | Current | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	3,457,042	3,524,406
Agricultural Finance | Total Past Due
Guarantor Obligations [Line Items]
Total Loans	42,948	30,105
Agricultural Finance | Total Past Due | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	22,984	10,382
Agricultural Finance | 30-59 Days
Guarantor Obligations [Line Items]
Total Loans	19,491	16,478
Agricultural Finance | 30-59 Days | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	10,608	1,421
Agricultural Finance | 60-89 Days
Guarantor Obligations [Line Items]
Total Loans	18,763	7,268
Agricultural Finance | 60-89 Days | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	9,901	1,358
Agricultural Finance | 90 Days and Greater
Guarantor Obligations [Line Items]
Total Loans	4,694	6,359
Agricultural Finance | 90 Days and Greater | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	2,475	7,603
Infrastructure Finance
Guarantor Obligations [Line Items]
Total Loans	5,484,656	4,774,483
Infrastructure Finance | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	1,154,326	732,731
Infrastructure Finance | Current
Guarantor Obligations [Line Items]
Total Loans	5,484,656	4,774,483
Infrastructure Finance | Current | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	1,154,326	732,731
Infrastructure Finance | Total Past Due
Guarantor Obligations [Line Items]
Total Loans	0	0
Infrastructure Finance | Total Past Due | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	0	0
Infrastructure Finance | 30-59 Days
Guarantor Obligations [Line Items]
Total Loans	0	0
Infrastructure Finance | 30-59 Days | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	0	0
Infrastructure Finance | 60-89 Days
Guarantor Obligations [Line Items]
Total Loans	0	0
Infrastructure Finance | 60-89 Days | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	0	0
Infrastructure Finance | 90 Days and Greater
Guarantor Obligations [Line Items]
Total Loans	0	0
Infrastructure Finance | 90 Days and Greater | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	$ 0	$ 0