Consolidated Statements Of Changes In Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Stock Compensation Plans [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Total
Balance at Jul. 31, 2009	$ 443,216		$ 615,817	$ 19,894	$ (9,677)	$ (380,632)	$ 688,618
Comprehensive income
Net earnings			166,163				166,163
Foreign currency translation					(15,961)		(15,961)
Pension liability adjustment, net of deferred taxes					(14,780)		(14,780)
Net gain (loss) on hedging derivatives					(68)		(68)
Comprehensive income							135,354
Treasury stock acquired						(66,696)	(66,696)
Stock options exercised		(5,608)	(7,678)	2,676		22,951	12,341
Deferred stock and other activity		(704)	(30)	(244)		1,707	729
Performance awards		7	(7)
Stock option expense			6,891				6,891
Tax reduction - employee plans		6,305					6,305
Dividends ( per share)			(36,909)				(36,909)
Balance at Jul. 31, 2010	443,216		744,247	22,326	(40,486)	(422,670)	746,633
Comprehensive income
Net earnings			225,291				225,291
Foreign currency translation					72,505		72,505
Pension liability adjustment, net of deferred taxes					7,166		7,166
Net gain (loss) on hedging derivatives					842		842
Comprehensive income							305,804
Treasury stock acquired						(108,929)	(108,929)
Stock options exercised		(10,792)	(7,854)	1,862		30,604	13,820
Deferred stock and other activity		(1,418)	174	548		2,185	1,489
Performance awards		(7)	7
Stock option expense			6,462				6,462
Tax reduction - employee plans		12,217					12,217
Dividends ( per share)			(42,785)				(42,785)
Balance at Jul. 31, 2011	443,216		925,542	24,736	40,027	(498,810)	934,711
Comprehensive income
Net earnings			264,301				264,301
Foreign currency translation					(98,723)		(98,723)
Pension liability adjustment, net of deferred taxes					(42,520)		(42,520)
Net gain (loss) on hedging derivatives					(672)		(672)
Comprehensive income							122,386
Treasury stock acquired						(130,233)	(130,233)
Stock options exercised		(9,834)	(5,116)			27,698	12,748
Deferred stock and other activity		(2,158)	312	213		1,926	293
Performance awards			(9)	(1)			(10)
Stock option expense			7,800				7,800
Tax reduction - employee plans		11,992					11,992
Two-for-one Stock split	315,000		(776,369)			461,369	0
Dividends ( per share)			(49,673)				(49,673)
Balance at Jul. 31, 2012	$ 758,216		$ 366,788	$ 24,948	$ (101,888)	$ (138,050)	$ 910,014