GUARANTEES AND COMMITMENTS - Unpaid Principal Balances by Delinquency Status (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Guarantor Obligations [Line Items]
Total Loans	$ 11,636,815	$ 11,183,408
Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	4,377,454	4,267,519
Current
Guarantor Obligations [Line Items]
Total Loans	13,750,605	13,410,152
Current | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	4,359,743	4,257,137
Total Past Due
Guarantor Obligations [Line Items]
Total Loans	39,625	30,105
Total Past Due | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	17,711	10,382
30-59 Days
Guarantor Obligations [Line Items]
Total Loans	22,498	16,478
30-59 Days | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	9,785	1,421
60-89 Days
Guarantor Obligations [Line Items]
Total Loans	7,031	7,268
60-89 Days | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	3,386	1,358
90 Days and Greater
Guarantor Obligations [Line Items]
Total Loans	10,096	6,359
90 Days and Greater | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	4,540	7,603
Agricultural Finance | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	3,511,528	3,534,788
Agricultural Finance | Current
Guarantor Obligations [Line Items]
Total Loans	8,641,615	8,635,669
Agricultural Finance | Current | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	3,493,817	3,524,406
Agricultural Finance | Total Past Due
Guarantor Obligations [Line Items]
Total Loans	39,625	30,105
Agricultural Finance | Total Past Due | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	17,711	10,382
Agricultural Finance | 30-59 Days
Guarantor Obligations [Line Items]
Total Loans	22,498	16,478
Agricultural Finance | 30-59 Days | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	9,785	1,421
Agricultural Finance | 60-89 Days
Guarantor Obligations [Line Items]
Total Loans	7,031	7,268
Agricultural Finance | 60-89 Days | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	3,386	1,358
Agricultural Finance | 90 Days and Greater
Guarantor Obligations [Line Items]
Total Loans	10,096	6,359
Agricultural Finance | 90 Days and Greater | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	4,540	7,603
Infrastructure Finance
Guarantor Obligations [Line Items]
Total Loans	5,108,990	4,774,483
Infrastructure Finance | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	865,926	732,731
Infrastructure Finance | Current
Guarantor Obligations [Line Items]
Total Loans	5,108,990	4,774,483
Infrastructure Finance | Current | Long-Term Standby Purchase Commitments and Guaranteed Securities
Guarantor Obligations [Line Items]
Total Loans	865,926	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