Consolidated Condensed Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Nov. 30, 2011	Nov. 30, 2010	Nov. 30, 2011	Nov. 30, 2010
Consolidated Condensed Statements Of Income [Abstract]
Revenues	$ 158,273	$ 133,131	$ 299,366	$ 237,642
Operating expenses	107,827	89,387	204,473	162,352
Gross margin	50,446	43,744	94,893	75,290
Selling, general and administrative expenses	33,772	30,240	66,906	55,353
Earnings from unconsolidated affiliates	406	327	848	635
Operating income	17,080	13,831	28,835	20,572
Interest expense, net	567	407	1,150	846
Foreign currency (gain) loss	(107)	30	164	(11)
Earnings before income taxes	16,620	13,394	27,521	19,737
Provision for income taxes	6,232	5,358	10,320	7,895
Net income	10,388	8,036	17,201	11,842
Less: Income (loss) attributable to non-controlling interest	46	(25)	65	(25)
Net income available to team shareholders	$ 10,342	$ 8,061	$ 17,136	$ 11,867
Net income per share: Basic	$ 0.53	$ 0.42	$ 0.88	$ 0.62
Net income per share: Diluted	$ 0.50	$ 0.41	$ 0.83	$ 0.60