Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2023	Aug. 31, 2022	Aug. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 468,173	$ 396,917	$ 399,590
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	105,384	86,683	64,476
Amortization of lease right-of-use assets	32,344	43,032	42,846
Stock-based compensation expense	62,038	56,003	45,065
Deferred income taxes	(31,119)	(8,715)	(4,602)
Asset impairments	25,946	64,272	0
Changes in assets and liabilities, net of effects of acquisitions
Accounts receivable, net of reserves	(40,103)	(32,980)	3,646
Accounts payable and accrued expenses	8,393	12,815	2,068
Accrued compensation	(3,431)	14,524	21,815
Deferred revenues	(3,387)	(6,100)	5,078
Taxes payable, net of prepaid taxes	41,396	(19,275)	26,298
Lease liabilities, net	(39,704)	(48,628)	(42,750)
Other, net	19,643	(20,271)	(8,304)
Net cash provided by operating activities	645,573	538,277	555,226
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property, equipment, leasehold improvements and capitalized internal-use software	(60,786)	(51,156)	(61,325)
Acquisition of businesses, net of cash and cash equivalents acquired	(23,593)	(1,981,641)	(58,056)
Purchases of investments	(11,014)	(878)	(18,787)
Proceeds from maturity or sale of investments	0	0	2,176
Net cash provided by (used in) investing activities	(95,393)	(2,033,675)	(135,992)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from debt	0	2,238,355	0
Repayments of debt	(375,000)	(825,000)	0
Payments of debt issuance costs	0	(9,736)	0
Dividend payments	(138,601)	(125,934)	(117,927)
Proceeds from employee stock plans	72,006	86,047	64,177
Repurchases of common stock	(176,720)	(18,639)	(264,702)
Other financing activities	(13,709)	(5,859)	(4,259)
Net cash provided by (used in) financing activities	(632,024)	1,339,234	(322,711)
Effect of exchange rate changes on cash and cash equivalents	4,015	(22,428)	(263)
Net increase (decrease) in cash and cash equivalents	(77,829)	(178,592)	96,260
Cash and cash equivalents at beginning of period	503,273	681,865	585,605
Cash and cash equivalents at end of period	425,444	503,273	681,865
Supplemental Disclosure of Cash Flow Information
Cash paid during the year for interest	76,524	29,525	8,021
Cash paid during the year for income taxes, net of refunds	91,170	76,252	46,588
Supplemental Disclosure of Non-Cash Transactions
Dividends declared, not paid	$ 37,265	$ 33,860	$ 30,845