GUARANTEES AND COMMITMENTS - Unpaid Principal Balances by Delinquency Status (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Guarantor Obligations [Line Items]
Total Loans	$ 9,623,119	$ 9,008,979
Agricultural Finance
Guarantor Obligations [Line Items]
Total Loans	3,932,857	3,714,184
Current
Guarantor Obligations [Line Items]
Total Loans	11,264,691	10,459,282
Current | Agricultural Finance
Guarantor Obligations [Line Items]
Total Loans	3,925,931	3,698,131
Total Past Due
Guarantor Obligations [Line Items]
Total Loans	30,270	11,598
Total Past Due | Agricultural Finance
Guarantor Obligations [Line Items]
Total Loans	6,926	16,053
30-59 Days
Guarantor Obligations [Line Items]
Total Loans	15,326	10,066
30-59 Days | Agricultural Finance
Guarantor Obligations [Line Items]
Total Loans	2,776	11,614
60-89 Days
Guarantor Obligations [Line Items]
Total Loans	3,953	392
60-89 Days | Agricultural Finance
Guarantor Obligations [Line Items]
Total Loans	2,366	622
90 Days and Greater
Guarantor Obligations [Line Items]
Total Loans	10,991	1,140
90 Days and Greater | Agricultural Finance
Guarantor Obligations [Line Items]
Total Loans	1,784	3,817
Agricultural Finance | Agricultural Finance
Guarantor Obligations [Line Items]
Total Loans	3,397,844	3,190,992
Agricultural Finance | Current
Guarantor Obligations [Line Items]
Total Loans	7,729,928	7,438,016
Agricultural Finance | Current | Agricultural Finance
Guarantor Obligations [Line Items]
Total Loans	3,390,918	3,174,939
Agricultural Finance | Total Past Due
Guarantor Obligations [Line Items]
Total Loans	30,270	11,598
Agricultural Finance | Total Past Due | Agricultural Finance
Guarantor Obligations [Line Items]
Total Loans	6,926	16,053
Agricultural Finance | 30-59 Days
Guarantor Obligations [Line Items]
Total Loans	15,326	10,066
Agricultural Finance | 30-59 Days | Agricultural Finance
Guarantor Obligations [Line Items]
Total Loans	2,776	11,614
Agricultural Finance | 60-89 Days
Guarantor Obligations [Line Items]
Total Loans	3,953	392
Agricultural Finance | 60-89 Days | Agricultural Finance
Guarantor Obligations [Line Items]
Total Loans	2,366	622
Agricultural Finance | 90 Days and Greater
Guarantor Obligations [Line Items]
Total Loans	10,991	1,140
Agricultural Finance | 90 Days and Greater | Agricultural Finance
Guarantor Obligations [Line Items]
Total Loans	1,784	3,817
Rural Infrastructure Finance
Guarantor Obligations [Line Items]
Total Loans	3,534,763	3,021,266
Rural Infrastructure Finance | Rural Infrastructure Finance
Guarantor Obligations [Line Items]
Total Loans	535,013	523,192
Rural Infrastructure Finance | Current
Guarantor Obligations [Line Items]
Total Loans	3,534,763	3,021,266
Rural Infrastructure Finance | Current | Rural Infrastructure Finance
Guarantor Obligations [Line Items]
Total Loans	535,013	523,192
Rural Infrastructure Finance | Total Past Due
Guarantor Obligations [Line Items]
Total Loans	0	0
Rural Infrastructure Finance | Total Past Due | Rural Infrastructure Finance
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 | Rural Infrastructure Finance
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 | Rural Infrastructure Finance
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 | Rural Infrastructure Finance
Guarantor Obligations [Line Items]
Total Loans	$ 0	$ 0