STOCK OPTIONS (Details) (USD $)	12 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010
Share-based Compensation Arrangement, Shares Available for Grant [Roll Forward]
Opening Balance Outstanding Shares (Shares Available For Grant)	1,667,000	2,258,000	2,590,000
Number of Shares Granted	(259,000)	(591,000)	(332,000)
Cancelled unissured shares (Shares Available For Grant)	(18,000)
Number of Shares Forfeited During the Period			0
Shares approved by Shareholders (Shares Available for Grant)	2,125,000
Expired unissued shares (Shares Available For Grant)	(1,603,000)
Ending Balance Outstanding Shares (Shares Available For Grant)	1,912,000	1,667,000	2,258,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding (Shares Under Option)	2,314,000	3,340,000	3,639,000
Granted (Shares Under Option)	259,000	591,000	332,000
Cancelled (Shares Under Option)		(3,000)	(1,000)
Exercised (Shares Under Option)	(254,000)	(1,614,000)	(630,000)
Outstanding (Shares Under Option)	2,319,000	2,314,000	3,340,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding (in dollars per share)	$ 18.13	$ 9.68	$ 7.44
Granted (in dollars per share)	$ 31.21	$ 32.25	$ 26.15
Cancelled (in dollars per share)		$ 4.95	$ 6.98
Exercised (in dollars per share)	$ 4.03	$ 5.85	$ 5.39
Outstanding (in dollars per share)	$ 21.13	$ 18.13	$ 9.68