Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Oct. 31, 2012	Oct. 31, 2011
Operating Activities
Net earnings	$ 54,113	$ 68,553
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	16,026	15,574
Changes in operating assets and liabilities	1,910	(21,932)
Tax benefit of equity plans	(5,527)	(2,171)
Stock compensation plan expense	1,476	1,690
Deferred taxes	(4,282)	(6,759)
Other, net	347	2,731
Net cash provided by operating activities	64,063	57,686
Investing Activities
Net expenditures on property, plant, and equipment	(21,404)	(18,491)
Change in short term investments	12,868
Net cash used in investing activities	(8,536)	(18,491)
Financing Activities
Purchase of treasury stock	(50,731)	(73,558)
Repayments of long-term debt	(126)	(149)
Change in short-term borrowings	(28,577)	78,912
Dividends paid	(13,292)	(11,193)
Tax benefit of equity plans	5,527	2,171
Exercise of stock options	5,576	2,961
Net cash used in financing activities	(81,623)	(856)
Effect of exchange rate changes on cash	5,077	(9,620)
Increase in cash and cash equivalents	(21,019)	28,719
Cash and cash equivalents, beginning of year	225,789	225,789
Cash and cash equivalents, end of period	$ 204,770	$ 302,213