Consolidated Condensed Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Nov. 30, 2012		Nov. 30, 2011		Nov. 30, 2012		Nov. 30, 2011
Net income	$ 78,027		$ 74,350		$ 154,760		$ 142,988
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	1,675		(20,764)		8,692		(20,546)
Change in fair value of derivatives(1)	0	[1]	27	[1]	(151)	[1]	181	[1]
Amortization of interest rate lock agreements	488		377		976		754
Change in fair value of available-for-sale securities(2)	(10)	[2]	7	[2]	(12)	[2]	25	[2]
Other comprehensive income	2,153		(20,353)		9,505		(19,586)
Comprehensive income	$ 80,180		$ 53,997		$ 164,265		$ 123,402

[1] Net of less than $0.1 million of tax benefit for the three months ended November 30, 2011. Net of less than $0.1 million of tax expense and $0.1 million of tax benefit for the six months ended November 30, 2012 and 2011, respectively.

[2] Net of less than $0.1 million of tax benefit for the three months ended November 30, 2012 and 2011, respectively. Net of less than $0.1 million of tax benefit for both the six months ended November 30, 2012 and 2011, respectively.