CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jul. 31, 2013	Jul. 31, 2012
CONSOLIDATED BALANCE SHEETS
Accounts receivable, allowance for doubtful accounts (in dollars)	$ 1,265	$ 1,041
Preferred Stock, par value (in dollars per share)	$ 1.00	$ 1.00
Preferred Stock, authorized shares	1,000,000	1,000,000
Preferred Stock, shares issued	0	0
Common Stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common Stock, authorized shares	75,000,000
Common Stock, shares issued	45,181,655	44,996,847
Common Stock, shares outstanding	41,138,121	40,651,093
Treasury Stock, shares	4,043,534	4,345,754