FINANCIAL INSTRUMENTS (Details 4) (USD $) In Thousands, unless otherwise specified	0 Months Ended	3 Months Ended
	Apr. 23, 2007	Apr. 30, 2007	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012
Treasury lock agreements
Amount of unrecognized loss portion in accumulated other comprehensive loss			$ 2,097	$ (1,109)	$ (210)
Treasury lock agreement based on U.S. Treasury security | Cash flow hedges.
Treasury lock agreements
Number of treasury lock agreements		3
Net settlement of unrecognized loss portion recorded in accumulated other comprehensive loss	182
Amount of unrecognized loss portion in accumulated other comprehensive loss			137	143
Treasury lock agreement based on U.S. Treasury security, one and two
Treasury lock agreements
Principal balance		30,000
Treasury lock agreement based on U.S. Treasury security, one and two | Cash flow hedges.
Treasury lock agreements
Amortization period		30 years
Treasury lock agreement based on U.S. Treasury security, three | Cash flow hedges.
Treasury lock agreements
Principal balance		40,000