GUARANTEES AND COMMITMENTS - Credit Quality Indicators (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Total
Total	$ 11,636,815		$ 11,183,408
Infrastructure Finance
Year One
Total	295,563		1,158,427
Current period charge-offs	0	$ 0
Year Two
Total	1,172,130		534,499
Current period charge-offs	0	0
Year Three
Total	533,148		642,402
Current period charge-offs	0	0
Year Four
Total	640,751		174,232
Current period charge-offs	0	0
Year Five
Total	175,924		574,135
Current period charge-offs	0	0
Prior
Total	1,761,509		1,229,626
Current period charge-offs	0	0
Revolving Loans - Amortized Cost Basis
Total	529,965		461,162
Current period charge-offs	0	0
Total
Total	5,108,990		4,774,483
Current period charge-offs	0	0
Acceptable | Infrastructure Finance
Year One
Total	295,563		1,158,427
Year Two
Total	1,172,130		521,143
Year Three
Total	520,026		578,882
Year Four
Total	601,968		174,232
Year Five
Total	175,924		574,135
Prior
Total	1,761,509		1,229,626
Revolving Loans - Amortized Cost Basis
Total	529,965		461,162
Total
Total	5,057,085		4,697,607
Special mention | Infrastructure Finance
Year One
Total	0		0
Year Two
Total	0		0
Year Three
Total	0		34,388
Year Four
Total	9,724		0
Year Five
Total	0		0
Prior
Total	0		0
Revolving Loans - Amortized Cost Basis
Total	0		0
Total
Total	9,724		34,388
Substandard | Infrastructure Finance
Year One
Total	0		0
Year Two
Total	0		13,356
Year Three
Total	13,122		29,132
Year Four
Total	29,059		0
Year Five
Total	0		0
Prior
Total	0		0
Revolving Loans - Amortized Cost Basis
Total	0		0
Total
Total	42,181		42,488
Long-Term Standby Purchase Commitments and Guaranteed Securities
Total
Total	4,377,454		4,267,519
Long-Term Standby Purchase Commitments and Guaranteed Securities | Agricultural Finance
Year One
Total	18,183		70,757
Current period charge-offs	0	0
Year Two
Total	86,202		169,609
Current period charge-offs	0	0
Year Three
Total	171,538		273,717
Current period charge-offs	0	0
Year Four
Total	263,317		580,836
Current period charge-offs	0	0
Year Five
Total	573,750		594,297
Current period charge-offs	0	0
Prior
Total	1,912,507		1,379,249
Current period charge-offs	0	0
Revolving Loans - Amortized Cost Basis
Total	486,031		466,323
Current period charge-offs	0	0
Total
Total	3,511,528		3,534,788
Current period charge-offs	0	0
Long-Term Standby Purchase Commitments and Guaranteed Securities | Infrastructure Finance
Year One
Total	0		0
Current period charge-offs	0	0
Year Two
Total	0		0
Current period charge-offs	0	0
Year Three
Total	0		0
Current period charge-offs	0	0
Year Four
Total	0		0
Current period charge-offs	0	0
Year Five
Total	0		0
Current period charge-offs	0	0
Prior
Total	347,889		355,848
Current period charge-offs	0	0
Revolving Loans - Amortized Cost Basis
Total	518,037		376,883
Current period charge-offs	0	0
Total
Total	865,926		732,731
Current period charge-offs	0	$ 0
Long-Term Standby Purchase Commitments and Guaranteed Securities | Acceptable | Agricultural Finance
Year One
Total	18,183		70,757
Year Two
Total	86,202		163,646
Year Three
Total	163,699		267,551
Year Four
Total	249,627		563,747
Year Five
Total	551,903		583,598
Prior
Total	1,842,141		1,312,988
Revolving Loans - Amortized Cost Basis
Total	473,476		452,909
Total
Total	3,385,231		3,415,196
Long-Term Standby Purchase Commitments and Guaranteed Securities | Acceptable | Infrastructure Finance
Year One
Total	0		0
Year Two
Total	0		0
Year Three
Total	0		0
Year Four
Total	0		0
Year Five
Total	0		0
Prior
Total	347,889		355,848
Revolving Loans - Amortized Cost Basis
Total	518,037		376,883
Total
Total	865,926		732,731
Long-Term Standby Purchase Commitments and Guaranteed Securities | Special mention | Agricultural Finance
Year One
Total	0		0
Year Two
Total	0		5,963
Year Three
Total	7,839		4,920
Year Four
Total	12,444		15,954
Year Five
Total	7,717		4,354
Prior
Total	48,271		44,964
Revolving Loans - Amortized Cost Basis
Total	12,226		12,197
Total
Total	88,497		88,352
Long-Term Standby Purchase Commitments and Guaranteed Securities | Special mention | Infrastructure Finance
Year One
Total	0		0
Year Two
Total	0		0
Year Three
Total	0		0
Year Four
Total	0		0
Year Five
Total	0		0
Prior
Total	0		0
Revolving Loans - Amortized Cost Basis
Total	0		0
Total
Total	0		0
Long-Term Standby Purchase Commitments and Guaranteed Securities | Substandard | Agricultural Finance
Year One
Total	0		0
Year Two
Total	0		0
Year Three
Total	0		1,246
Year Four
Total	1,246		1,135
Year Five
Total	14,130		6,345
Prior
Total	22,095		21,297
Revolving Loans - Amortized Cost Basis
Total	329		1,217
Total
Total	37,800		31,240
Long-Term Standby Purchase Commitments and Guaranteed Securities | Substandard | Infrastructure Finance
Year One
Total	0		0
Year Two
Total	0		0
Year Three
Total	0		0
Year Four
Total	0		0
Year Five
Total	0		0
Prior
Total	0		0
Revolving Loans - Amortized Cost Basis
Total	0		0
Total
Total	$ 0		$ 0