CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive (Loss) Income	Treasury Stock	Noncontrolling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect adjustment for adoption of new accounting standards				$ 40,855
Beginning Balance at Aug. 31, 2018	$ 1,963,380	$ 257	$ 2,218,673	1,760,097	$ (19,399)	$ (2,009,371)	$ 13,123
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under employee stock purchase plan		1	14,587
Vesting of restricted stock awards		2	(2)
Recognition of stock-based compensation			31,708
Declared dividends				(25,806)
Net (loss) income	191,681			190,954			727
Other comprehensive (loss) income	6,146				6,146
Purchases of treasury stock under employee stock plans						(11,204)
Treasury shares purchased						(350,323)
Acquisition of noncontrolling interests							1,112
Disposition of noncontrolling interests							(1,785)
Declared dividends to noncontrolling interests							(1,500)
Ending Balance at Feb. 28, 2019	1,858,852	260	2,264,966	1,966,100	(13,253)	(2,370,898)	11,677
Beginning Balance at Nov. 30, 2018	1,905,513	259	2,235,827	1,911,451	(31,948)	(2,223,673)	13,597
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under employee stock purchase plan		1	14,579
Recognition of stock-based compensation			14,560
Declared dividends				(12,705)
Net (loss) income	67,607			67,354			253
Other comprehensive (loss) income	18,695				18,695
Purchases of treasury stock under employee stock plans						(1,489)
Treasury shares purchased						(145,736)
Acquisition of noncontrolling interests							1,112
Disposition of noncontrolling interests							(1,785)
Declared dividends to noncontrolling interests							(1,500)
Ending Balance at Feb. 28, 2019	1,858,852	260	2,264,966	1,966,100	(13,253)	(2,370,898)	11,677
Beginning Balance at Aug. 31, 2019	1,900,758	260	2,304,552	2,037,037	(82,794)	(2,371,612)	13,315
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under employee stock purchase plan		1	16,179
Vesting of restricted stock awards		2	(2)
Recognition of stock-based compensation			43,110
Declared dividends				(25,222)
Net (loss) income	38,133			37,139			994
Other comprehensive (loss) income	(20,149)				(20,149)
Purchases of treasury stock under employee stock plans						(23,010)
Treasury shares purchased						(168,660)
Declared dividends to noncontrolling interests							(2,000)
Ending Balance at Feb. 29, 2020	1,759,140	263	2,363,839	2,048,954	(102,943)	(2,563,282)	12,309
Beginning Balance at Nov. 30, 2019	1,849,293	262	2,332,307	2,064,758	(74,322)	(2,487,319)	13,607
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under employee stock purchase plan		1	16,179
Recognition of stock-based compensation			15,353
Declared dividends				(12,521)
Net (loss) income	(2,581)			(3,283)			702
Other comprehensive (loss) income	(28,621)				(28,621)
Purchases of treasury stock under employee stock plans						(3,693)
Treasury shares purchased						(72,270)
Declared dividends to noncontrolling interests							(2,000)
Ending Balance at Feb. 29, 2020	$ 1,759,140	$ 263	$ 2,363,839	$ 2,048,954	$ (102,943)	$ (2,563,282)	$ 12,309