CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Jul. 31, 2012	Jul. 31, 2011
Statement of Financial Position [Abstract]
Common stock, par value per share (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized	500,000	500,000
Common stock, shares issued	127,958	127,958
Treasury stock, shares	13,770	12,963