Consolidated Condensed Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Aug. 31, 2013		Aug. 31, 2012
Net income	$ 77,754		$ 76,733
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments	(646)		7,017
Change in fair value of derivatives	0	[1]	(151)	[1]
Amortization of interest rate lock agreements	488	[2]	488	[2]
Change in fair value of available-for-sale securities	(14)	[3]	(2)	[3]
Other comprehensive (loss) income	(172)		7,352
Comprehensive income	$ 77,582		$ 84,085

[1] Net of less than $0.1 million of tax expense for the three months ended August 31, 2012

[2] Net of less than $0.1 million of tax benefit for the three months ended August 31, 2013 and 2012, respectively.

[3] Net of less than $0.1 million of tax expense for the three months ended August 31, 2013 and 2012, respectively.