CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - 9 months ended May 31, 2018 - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income	Treasury Stock	Noncontrolling Interests
Beginning Balance (in shares) at Aug. 31, 2017	177,727,653	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)		29,688
Shares issued under employee stock purchase plan (in shares)		575,777
Shares issued under employee stock purchase plan	12,845	$ 1	12,844
Vesting of restricted stock awards (in shares)		2,718,379
Vesting of restricted stock awards		$ 3	(3)
Purchases of treasury stock under employee stock plans (in shares)		(790,598)
Purchases of treasury stock under employee stock plans	(22,526)					(22,526)
Treasury shares purchased (in shares)		(11,461,155)
Treasury shares purchased	(316,394)					(316,394)
Recognition of stock-based compensation	74,362		74,362
Declared dividends	(43,616)			(43,616)
Comprehensive income	115,461			143,644	(28,688)		505
Declared dividends to noncontrolling interest	(2,920)						(2,920)
Foreign currency adjustments attributable to noncontrolling interests	$ 2						2
Ending Balance (in shares) at May. 31, 2018	168,799,744	168,799,744
Ending Balance at May. 31, 2018	$ 2,185,558	$ 257	$ 2,191,406	$ 1,830,921	$ 25,932	$ (1,875,375)	$ 12,417