RELATED PARTY TRANSACTIONS - Schedule of Related Party Transactions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Zions
Related Party Transaction [Line Items]
Related party, transaction amount	$ 11,200	$ 10,400	$ 11,000
CFC
Related Party Transaction [Line Items]
Related party, transaction amount	1,748,254	1,087,419	1,577,117
Loans | Zions
Related Party Transaction [Line Items]
Related party, transaction amount	160,079	274,517	214,319
Loans | CFC
Related Party Transaction [Line Items]
Related party, transaction amount	298,254	386,998	127,117
USDA Securities | Zions
Related Party Transaction [Line Items]
Related party, transaction amount	231	4,171	9,565
Sales of Farmer Mac Guaranteed Securities | Zions
Related Party Transaction [Line Items]
Related party, transaction amount	0	99,643	0
LTSPCs | CFC
Related Party Transaction [Line Items]
Related party, transaction amount	0	30,421	0
AgVantage Securities | CFC
Related Party Transaction [Line Items]
Related party, transaction amount	$ 1,450,000	$ 670,000	$ 1,450,000