TREASURY STOCK (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Oct. 31, 2014	Jul. 31, 2014
Stock Repurchase Program [Roll Forward]
Amount available for repurchases as of July 31, 2014	$ 581,873	$ 681,873
New authorizations	200,000
Utilized	(300,000)
Amount available for repurchases as of October 31, 2014	581,873	681,873
January 17, 2013 Authorization [Member]
Stock Repurchase Program [Roll Forward]
Amount available for repurchases as of July 31, 2014	0	81,873
New authorizations	0
Utilized	(81,873)
Amount available for repurchases as of October 31, 2014	0	81,873
July 17, 2014 Authorization [Member]
Stock Repurchase Program [Roll Forward]
Amount available for repurchases as of July 31, 2014	381,873	600,000
New authorizations	0
Utilized	(218,127)
Amount available for repurchases as of October 31, 2014	381,873	600,000
October 9, 2014 Authorization [Member]
Stock Repurchase Program [Roll Forward]
Amount available for repurchases as of July 31, 2014	200,000	0
New authorizations	200,000
Utilized	0
Amount available for repurchases as of October 31, 2014	$ 200,000	$ 0