Fair Value Measurement (Tables)

3 Months Ended

Aug. 31, 2014

Fair Value Disclosures [Abstract]

Schedule of the entity's assets and liabilities that are measured at fair value on a recurring basis

The following table presents our assets and liabilities that are measured at fair value on a recurring basis as of August 31, 2014 and May 31, 2014.

	August 31, 2014				May 31, 2014
(Dollars in thousands)	Level 1		Level 2		Level 1		Level 2
Derivative assets	$	—	$	165,563	$	—	$	209,759
Derivative liabilities	—		373,931		—		388,208
Investments in common and preferred stock	82,877		—		55,177		—
Deferred compensation investments	4,367		—		4,156		—

Schedule of carrying/fair value of the related individual assets and the total losses

The following table provides the carrying/fair value of the related individual assets as of August 31, 2014 and May 31, 2014 and the total losses for the three months ended August 31, 2014 and 2013.

	Level 3 Fair Value				Total Losses For The Three Months Ended August 31,
(Dollars in thousands)	August 31, 2014		May 31, 2014		2014			2013
Nonperforming loans, net of specific reserves	$	1,063	$	1,669	$	(226	)	$	—