CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common stock:	Additional paid-in capital:	Retained earnings:	Accumulated other comprehensive loss:	Treasury stock:	Noncontrolling interests:
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		2	(2)
Recognition of stock-based compensation			43,110
Declared dividends				(25,222)
Net income (loss)	38,133			37,139			994
Other comprehensive income (loss)	(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
Vesting of restricted stock		0	0
Recognition of stock-based compensation			15,353
Declared dividends				(12,521)
Net income (loss)	(2,581)			(3,283)			702
Other comprehensive income (loss)	(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
Beginning Balance at Aug. 31, 2020	1,825,399	264	2,413,616	2,040,922	(34,168)	(2,609,250)	14,015
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under employee stock purchase plan		1	20,354
Vesting of restricted stock		2	(2)
Recognition of stock-based compensation			54,398
Declared dividends				(25,006)
Net income (loss)	353,361			352,096			1,265
Other comprehensive income (loss)	29,898				29,898
Purchases of treasury stock under employee stock plans						(21,969)
Treasury shares purchased						(131,995)
Declared dividends to noncontrolling interests							(2,499)
Ending Balance at Feb. 28, 2021	2,101,942	267	2,488,366	2,368,012	(4,270)	(2,763,214)	12,781
Beginning Balance at Nov. 30, 2020	1,993,951	266	2,445,582	2,228,729	(14,346)	(2,680,860)	14,580
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under employee stock purchase plan		1	20,354
Vesting of restricted stock		0	0
Recognition of stock-based compensation			22,430
Declared dividends				(12,371)
Net income (loss)	152,354			151,654			700
Other comprehensive income (loss)	10,076				10,076
Purchases of treasury stock under employee stock plans						(388)
Treasury shares purchased						(81,966)
Declared dividends to noncontrolling interests							(2,499)
Ending Balance at Feb. 28, 2021	$ 2,101,942	$ 267	$ 2,488,366	$ 2,368,012	$ (4,270)	$ (2,763,214)	$ 12,781