CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2010
Statement of Stockholders' Equity [Abstract]
Shares issued for stock plans (in shares)	1,474	2,394	1,313
Total number of shares repurchased (in shares)	2,281	2,867	2,720