Consolidated Statements of Cash Flows - Unaudited - USD ($) $ in Thousands	9 Months Ended
	May 31, 2020	May 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 283,859	$ 261,263
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	41,333	43,943
Stock-based compensation expense	28,372	24,135
Deferred income taxes	7,230	1,294
Loss on sale of assets	166	195
Changes in assets and liabilities, net of effects of acquisitions
Accounts receivable, net of reserves	(5,091)	3,112
Accounts payable and accrued expenses	10,400	(4,783)
Accrued compensation	(14,154)	(23,672)
Deferred fees	9,856	4,826
Taxes payable, net of prepaid taxes	(27,088)	(2,232)
Other, net	11,530	(2,757)
Net cash provided by operating activities	346,413	305,324
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property, equipment, leasehold improvements and intangible assets, net of proceeds from dispositions	(62,909)	(32,906)
Purchases of investments	(2,736)	(8,180)
Proceeds from maturity or sale of investments	4,199	11,543
Net cash used in investing activities	(61,446)	(29,543)
CASH FLOWS FROM FINANCING ACTIVITIES
Repurchases of common stock	(171,005)	(158,294)
Dividend payments	(81,438)	(75,769)
Proceeds from employee stock plans	65,323	78,926
Repayment of debt	0	(575,000)
Proceeds from debt	0	575,000
Other financing, net	(1,592)	(901)
Net cash used by financing activities	(188,712)	(156,038)
Effect of exchange rate changes on cash and cash equivalents	1,653	(4,406)
Net (decrease) increase in cash and cash equivalents	97,908	115,337
Cash and cash equivalents at beginning of period	359,799	208,623
Cash and cash equivalents at end of period	$ 457,707	$ 323,960