Consolidated Statements of Cash Flows - Unaudited - USD ($) $ in Thousands	6 Months Ended
	Feb. 28, 2022	Feb. 28, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 217,585	$ 197,849
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	32,827	30,962
Amortization of lease right-of-use assets	22,172	21,517
Stock-based compensation expense	25,937	22,327
Deferred income taxes	(3,264)	(2,802)
Impairment charge	13,987	0
Changes in assets and liabilities, net of effects of acquisitions
Accounts receivable, net of reserves	(37,704)	(15,421)
Accounts payable and accrued expenses	10,183	(724)
Accrued compensation	(34,680)	(20,879)
Deferred fees	6,201	12,445
Taxes payable, net of prepaid taxes	(21,824)	16,688
Lease liabilities, net	(23,863)	(20,549)
Other, net	(12,605)	(11,477)
Net cash provided by operating activities	194,952	229,936
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property, equipment, leasehold improvements and internal-use software	(20,546)	(28,758)
Acquisition of businesses, net of cash and cash equivalents acquired	(50,018)	(41,916)
Purchases of investments	(250)	(1,250)
Proceeds from maturity or sale of investments	0	2,176
Net cash used in investing activities	(70,814)	(69,748)
CASH FLOWS FROM FINANCING ACTIVITIES
Repurchases of common stock	(18,639)	(114,640)
Dividend payments	(61,448)	(58,186)
Proceeds from employee stock plans	56,928	28,526
Other financing activities	(3,258)	(2,359)
Net cash used by financing activities	(26,417)	(146,659)
Effect of exchange rate changes on cash and cash equivalents	(6,574)	3,550
Net increase in cash and cash equivalents	91,147	17,079
Cash and cash equivalents at beginning of period	681,865	585,605
Cash and cash equivalents at end of period	$ 773,012	$ 602,684