Consolidated Statements of Cash Flows - Unaudited - USD ($) $ in Thousands	3 Months Ended
	Nov. 30, 2021	Nov. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 107,647	$ 101,206
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	19,432	15,290
Amortization of lease right-of-use assets	11,117	10,697
Stock-based compensation expense	10,401	11,317
Deferred income taxes	1,507	437
Changes in assets and liabilities, net of effects of acquisitions
Accounts receivable, net of reserves	(5,268)	(342)
Accounts payable and accrued expenses	20,702	2,240
Accrued compensation	(53,457)	(45,858)
Deferred fees	(10,248)	(9,724)
Taxes payable, net of prepaid taxes	(9,524)	13,302
Lease liabilities, net	(10,521)	(10,007)
Other, net	(8,870)	718
Net cash provided by operating activities	72,918	89,276
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property, equipment, leasehold improvements and internal-use software	(8,583)	(18,333)
Acquisition of businesses, net of cash and cash equivalents acquired	(50,018)	(41,916)
Purchases of investments	(250)	(250)
Proceeds from maturity or sale of investments	0	2,177
Net cash used in investing activities	(58,851)	(58,322)
CASH FLOWS FROM FINANCING ACTIVITIES
Repurchases of common stock	(18,639)	(43,144)
Dividend payments	(30,656)	(29,103)
Proceeds from employee stock plans	35,763	17,993
Other financing activities	(2,950)	(2,123)
Net cash used by financing activities	(16,482)	(56,377)
Effect of exchange rate changes on cash and cash equivalents	(5,550)	(45)
Net decrease in cash and cash equivalents	(7,965)	(25,468)
Cash and cash equivalents at beginning of period	681,865	585,605
Cash and cash equivalents at end of period	$ 673,900	$ 560,137