Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Feb. 29, 2016	Feb. 28, 2015
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 127,727	$ 117,458
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	18,260	16,222
Stock-based compensation expense	15,027	11,037
Deferred income taxes	$ 732	2,697
Gain on sale of assets		(4)
Tax benefits from share-based payment arrangements	$ (10,804)	(11,743)
Changes in assets and liabilities, net of effects of acquisitions
Accounts receivable, net of reserves	(5,683)	(9,280)
Accounts payable and accrued expenses	1,930	4,206
Accrued compensation	(10,180)	(12,753)
Deferred fees	913	2,624
Taxes payable, net of prepaid taxes	15,138	3,139
Prepaid expenses and other assets	1,816	(1,664)
Deferred rent and other non-current liabilities	9,372	(1,172)
Other working capital accounts, net	(22)	(27)
Net cash provided by operating activities	164,226	120,740
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of businesses, net of cash acquired	(264,087)	(30,133)
Purchases of investments	(12,530)	(12,437)
Proceeds from sales of investments	12,423	7,535
Purchases of property, equipment and leasehold improvements, net of proceeds from dispositions	(26,438)	(11,764)
Net cash used in investing activities	(290,632)	(46,799)
CASH FLOWS FROM FINANCING ACTIVITIES
Dividend payments	(36,132)	(32,286)
Repurchase of common stock	(115,695)	(106,317)
Proceeds from debt	265,000	35,000
Debt issuance costs	(12)	(32)
Proceeds from employee stock plans	26,848	34,393
Tax benefits from share-based payment arrangements	10,804	11,743
Net cash provided by (used in) financing activities	150,813	(57,499)
Effect of exchange rate changes on cash and cash equivalents	(8,151)	(10,750)
Net increase in cash and cash equivalents	16,256	5,692
Cash and cash equivalents at beginning of period	158,914	116,378
Cash and cash equivalents at end of period	$ 175,170	$ 122,070