CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Treasury Stock	Noncontrolling Interests
Beginning balance at Aug. 31, 2014	$ 1,472,806	$ 1,290	$ 359,338	$ (19,509)	$ 1,350,070	$ (218,494)	$ 111
Beginning balance, shares at Aug. 31, 2014		129,060,664
Beginning balance, treasury stock, shares at Aug. 31, 2014						(11,231,402)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	67,090				67,090
Other comprehensive income (loss)	(76,653)			(76,653)
Cash dividends ($0.36 per share)	(42,073)				(42,073)
Treasury stock acquired	(41,806)					$ (41,806)
Treasury stock acquired, shares						(2,902,218)
Issuance of stock under incentive and purchase plans, net of forfeitures	(1,389)		(15,077)			$ 13,688
Issuance of stock under incentive and purchase plans, net of forfeitures, shares						673,993
Stock-based compensation	15,127		15,127
Tax benefit from stock plans	122		122
Contribution of noncontrolling interest	38						38
Reclassification of share-based liability awards	3,948		3,948
Ending balance at May. 31, 2015	1,397,210	$ 1,290	363,458	(96,162)	1,375,087	$ (246,612)	149
Ending balance, shares at May. 31, 2015		129,060,664
Ending balance, treasury stock, shares at May. 31, 2015						(13,459,627)
Beginning balance at Aug. 31, 2015	$ 1,381,374	$ 1,290	365,863	(113,535)	1,373,568	$ (245,961)	149
Beginning balance, shares at Aug. 31, 2015	129,060,664	129,060,664.000
Beginning balance, treasury stock, shares at Aug. 31, 2015	(13,425,326)					(13,425,326)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	$ 54,893				54,893
Other comprehensive income (loss)	(13,645)			(13,645)
Cash dividends ($0.36 per share)	(41,586)				(41,586)
Treasury stock acquired	(30,595)					$ (30,595)
Treasury stock acquired, shares						(2,255,069)
Issuance of stock under incentive and purchase plans, net of forfeitures	(6,036)		(29,599)			$ 23,563
Issuance of stock under incentive and purchase plans, net of forfeitures, shares						1,246,329
Stock-based compensation	15,327		15,327
Tax benefit from stock plans	666		666
Contribution of noncontrolling interest	29		19				10
Reclassification of share-based liability awards	3,035		3,035
Ending balance at May. 31, 2016	$ 1,363,462	$ 1,290	$ 355,311	$ (127,180)	$ 1,386,875	$ (252,993)	$ 159
Ending balance, shares at May. 31, 2016	129,060,664	129,060,664
Ending balance, treasury stock, shares at May. 31, 2016	(14,434,066)					(14,434,066)