COMMON STOCK (Details 6) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jul. 31, 2011
Outstanding begining balance (in shares)	3,849
Granted (in shares)	216
Exercised (in shares)	(1,555)
Forfeited or Expired (in shares)	(67)
Outstanding ending balance (in shares)	2,443
Expected to vest at July 31, 2011 (in shares)	1,028
Exercisable at July 31, 2011 (in shares)	1,386
Outstanding begining balance (in dollars per share)	$ 29.75
Granted (in dollars per share)	$ 54.94
Exercised (in dollars per share)	$ 26.67
Forfeited or Expired (in dollars per share)	$ 27.31
Outstanding ending balance (in dollars per share)	$ 34.01
Expected to vest at July 31, 2011 (in dollars per share)	$ 37.89
Exercisable at July 31, 2011 (in dollars per share)	$ 30.94
Outstanding ending balance (in dollars per share)	4
Expected to vest at July 31, 2011 (in dollars per share)	5.3
Exercisable at July 31, 2011 (in dollars per share)	3
Outstanding ending balance (in shares)	$ 39,203
Expected to vest at July 31, 2011 (in shares)	13,116
Exercisable at July 31, 2011 (in shares)	$ 25,824