SHARE-BASED COMPENSATION EXPENSE (Details) shares in Thousands	3 Months Ended
	Jan. 31, 2017 $ / shares shares
Summary of stock option activity [Roll Forward]
Shares underlying options outstanding, Beginning balance (in shares) | shares	1,387
Shares underlying options outstanding, Exercised (in shares) | shares	(102)
Shares underlying options outstanding, Canceled (in shares) | shares	(187)
Shares underlying options outstanding, Ending balance (in shares) | shares	1,098
Weighted average exercise price [Roll Forward]
Weighted average exercise price, Beginning balance (in dollars per share) | $ / shares	$ 26.90
Weighted average exercise price, Exercised (in dollars per share) | $ / shares	9.58
Weighted average exercise price, Canceled (in dollars per share) | $ / shares	27.52
Weighted average exercise price, Ending balance (in dollars per share) | $ / shares	$ 28.41