TREASURY STOCK (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jan. 31, 2014	Jul. 31, 2013
Stock Repurchase Program [Roll Forward]
Amount available for repurchases as of July 31, 2013	$ 81,873	$ 331,873
New authorizations	0
Utilized	250,000
Amount available for repurchases as of January 31, 2014	81,873	331,873
September 26, 2011 Authorization [Member]
Stock Repurchase Program [Roll Forward]
Amount available for repurchases as of July 31, 2013	0	81,873
New authorizations	0
Utilized	81,873
Amount available for repurchases as of January 31, 2014	0	81,873
January 17, 2013 Authorization [Member]
Stock Repurchase Program [Roll Forward]
Amount available for repurchases as of July 31, 2013	81,873	250,000
New authorizations	0
Utilized	168,127
Amount available for repurchases as of January 31, 2014	$ 81,873	$ 250,000