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
Beginning Balance (in shares) at Aug. 31, 2017		177,727,653
Beginning Balance at Aug. 31, 2017	$ 2,368,344	$ 253	$ 2,104,203	$ 1,730,893	$ 54,620	$ (1,536,455)	$ 14,830
Shares issued upon exercise of stock options (in shares)		29,534
Vesting of restricted stock awards (in shares)		2,474,125
Vesting of restricted stock awards		$ 3	(3)
Purchases of treasury stock under employee stock plans (in shares)		(724,323)
Purchases of treasury stock under employee stock plans	(20,745)					(20,745)
Treasury shares purchased (in shares)		(3,201,329)
Treasury shares purchased	(93,309)					(93,309)
Recognition of stock-based compensation	44,973		44,973
Declared dividends	(15,353)			(15,353)
Comprehensive income	60,783			63,795	(3,136)		124
Foreign currency adjustments attributable to noncontrolling interests	(1)						(1)
Ending Balance (in shares) at Nov. 30, 2017		176,305,660
Ending Balance at Nov. 30, 2017	2,344,692	$ 256	2,149,173	1,779,335	51,484	(1,650,509)	14,953
Cumulative effect adjustment for adoption of new accounting standards	$ 40,855			40,855
Beginning Balance (in shares) at Aug. 31, 2018	164,588,172	164,588,172
Beginning Balance at Aug. 31, 2018	$ 1,963,380	$ 257	2,218,673	1,760,097	(19,399)	(2,009,371)	13,123
Shares issued under employee stock purchase plan (in shares)		354
Shares issued under employee stock purchase plan	8	$ 0	8
Vesting of restricted stock awards (in shares)		1,686,163
Vesting of restricted stock awards		$ 2	(2)
Purchases of treasury stock under employee stock plans (in shares)		(407,447)
Purchases of treasury stock under employee stock plans	(9,715)					(9,715)
Treasury shares purchased (in shares)		(7,880,346)
Treasury shares purchased	(204,587)					(204,587)
Recognition of stock-based compensation	17,148		17,148
Declared dividends	(13,101)			(13,101)
Comprehensive income	$ 111,525			123,600	(12,549)		474
Ending Balance (in shares) at Nov. 30, 2018	157,986,896	157,986,896
Ending Balance at Nov. 30, 2018	$ 1,905,513	$ 259	$ 2,235,827	$ 1,911,451	$ (31,948)	$ (2,223,673)	$ 13,597