COMMON STOCK (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Stock Repurchase Program [Roll Forward]
Amount available for repurchases as of July 31, 2013	$ 331,873
New authorizations	600,000
Utilized	250,000	250,000	121,164
Amount available for repurchases as of July 31, 2014	681,873	331,873
Sep 26 2011 [Member]
Stock Repurchase Program [Roll Forward]
Amount available for repurchases as of July 31, 2013	81,873
New authorizations	0
Utilized	81,873
Amount available for repurchases as of July 31, 2014	0
Jan 17 2013 [Member]
Stock Repurchase Program [Roll Forward]
Amount available for repurchases as of July 31, 2013	250,000
New authorizations	0
Utilized	168,127
Amount available for repurchases as of July 31, 2014	81,873
Jul 17, 2014 [Member]
Stock Repurchase Program [Roll Forward]
Amount available for repurchases as of July 31, 2013	0
New authorizations	600,000
Utilized	0
Amount available for repurchases as of July 31, 2014	$ 600,000