Consolidated Statements of Cash Flows - Unaudited - USD ($) $ in Thousands	6 Months Ended
	Feb. 29, 2020	Feb. 28, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 182,643	$ 168,998
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	28,296	29,052
Stock-based compensation expense	18,028	16,140
Deferred income taxes	(3,091)	1,088
Loss on sale of assets	145	196
Changes in assets and liabilities, net of effects of acquisitions
Accounts receivable, net of reserves	(21,835)	(19,676)
Accounts payable and accrued expenses	10,356	(5,423)
Accrued compensation	(23,518)	(26,266)
Deferred fees	10,775	9,729
Taxes payable, net of prepaid taxes	(12,182)	(17,385)
Other, net	5,843	(10,899)
Net cash provided by operating activities	195,460	145,554
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property, equipment and leasehold improvements, net of proceeds from dispositions	(51,899)	(21,482)
Purchases of investments	(2,236)	(7,927)
Proceeds from maturity or sale of investments	4,199	10,041
Net cash used in investing activities	(49,936)	(19,368)
CASH FLOWS FROM FINANCING ACTIVITIES
Repurchases of common stock	(158,595)	(110,739)
Dividend payments	(54,363)	(48,442)
Proceeds from employee stock plans	50,487	43,362
Other financing, net	(1,586)	0
Net cash used by financing activities	(164,057)	(115,819)
Effect of exchange rate changes on cash and cash equivalents	2,222	(655)
Net (decrease) increase in cash and cash equivalents	(16,311)	9,712
Cash and cash equivalents at beginning of period	359,799	208,623
Cash and cash equivalents at end of period	$ 343,488	$ 218,335