Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Oct. 31, 2014	Jul. 31, 2014
Condensed Consolidated Balance Sheets [Abstract]
Accounts receivable, allowance	$ 6,786	$ 6,763
Preferred stock, par value	$ 1.00	$ 1.00
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 5.00	$ 5.00
Common stock, shares authorized	240,000,000	240,000,000
Common stock, shares issued	151,643,194	151,643,194
Treasury stock, shares	14,345,280	11,237,522