SHARE-BASED COMPENSATION EXPENSE (Details) shares in Thousands	3 Months Ended
	Jan. 31, 2016 $ / shares shares
Summary of stock option activity [Roll Forward]
Shares Underlying Options Outstanding, Beginning Balance (in shares) | shares	2,293
Shares Underlying Options Outstanding, Exercised (in shares) | shares	(140)
Shares Underlying Options Outstanding, Canceled (in shares) | shares	(69)
Shares Underlying Options Outstanding, Ending Balance (in shares) | shares	2,084
Weighted average exercise price [Roll Forward]
Weighted Average Exercise Price, Beginning Balance (in dollars per share) | $ / shares	$ 24.45
Weighted Average Exercise Price, Exercised (in dollars per share) | $ / shares	8.42
Weighted Average Exercise Price, Canceled (in dollars per share) | $ / shares	36.67
Weighted Average Exercise Price, Ending Balance (in dollars per share) | $ / shares	$ 25.13