CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Aug. 31, 2014	Aug. 31, 2013
Income Statement [Abstract]
Interest income	$ 237,291	$ 241,071
Interest expense	(156,552)	(167,585)
Net interest income	80,739	73,486
Provision for loan losses	6,771	(1,278)
Net interest income after provision for loan losses	87,510	72,208
Non-interest income:
Fee and other income	4,357	4,156
Derivative (losses) gains, net	(49,878)	106,384
Results of operations of foreclosed assets	(2,699)	(4,049)
Total non-interest income	(48,220)	106,491
Non-interest expense:
Salaries and employee benefits	(10,797)	(10,328)
Other general and administrative expenses	(7,746)	(8,287)
Provision for guarantee liability	67	31
Other	(6)	(148)
Total non-interest expense	(18,482)	(18,732)
Income before income taxes	20,808	159,967
Income tax expense	(196)	(1,701)
Net income	20,612	158,266
Less: Net income attributable to noncontrolling interests	(211)	(2,718)
Net income attributable to CFC	$ 20,401	$ 155,548