CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Aug. 31, 2023	Aug. 31, 2022
Income Statement [Abstract]
Interest income	$ 380,956	$ 306,978
Interest expense	(316,281)	(209,468)
Net interest income	64,675	97,510
Provision for credit losses	(800)	(3,496)
Net interest income after provision for credit losses	63,875	94,014
Non-interest income:
Fee and other income	4,537	4,056
Derivative gains	189,887	93,587
Investment securities gains (losses)	2,933	(3,679)
Total non-interest income	197,357	93,964
Non-interest expense:
Salaries and employee benefits	(15,874)	(13,778)
Other general and administrative expenses	(15,629)	(11,741)
Losses on early extinguishment of debt	(939)	0
Other non-interest expense	(178)	(322)
Total non-interest expense	(32,620)	(25,841)
Income before income taxes	228,612	162,137
Income tax provision	(328)	(263)
Net income (loss)	228,284	161,874
Less: Net income attributable to noncontrolling interests	(427)	(193)
Net income attributable to CFC	$ 227,857	$ 161,681