Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2016	May 31, 2015	May 31, 2016	May 31, 2015
Revenues	$ 287,501	$ 254,522	$ 839,801	$ 744,990
Operating expenses
Cost of services	124,602	100,686	363,249	297,745
Selling, general and administrative	73,609	68,480	214,610	200,980
Total operating expenses	198,211	169,166	577,859	498,725
Operating income	89,290	85,356	261,942	246,265
Other (expense) income	(433)	482	(765)	1,445
Income before income taxes	88,857	85,838	261,177	247,710
Provision for income taxes	22,076	24,429	66,669	68,843
Net income	$ 66,781	$ 61,409	$ 194,508	$ 178,867
Basic earnings per common share (in dollars per share)	$ 1.64	$ 1.48	$ 4.73	$ 4.29
Diluted earnings per common share (in dollars per share)	$ 1.62	$ 1.45	$ 4.68	$ 4.23
Basic weighted average common shares (in shares)	40,779	41,628	41,094	41,648
Diluted weighted average common shares (in shares)	41,189	42,297	41,596	42,317