Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Nov. 30, 2017	Nov. 30, 2016
Revenues	$ 329,141	$ 288,063
Operating expenses
Cost of services	161,524	127,250
Selling, general and administrative	78,519	70,494
Total operating expenses	240,043	197,744
Operating income	89,098	90,319
Other expense	(2,919)	(499)
Income before income taxes	86,179	89,820
Provision for income taxes	15,800	23,237
Net income	$ 70,379	$ 66,583
Basic earnings per common share (in dollars per share)	$ 1.80	$ 1.67
Diluted earnings per common share (in dollars per share)	$ 1.77	$ 1.66
Basic weighted average common shares (in shares)	39,085	39,827
Diluted weighted average common shares (in shares)	39,680	40,100