OPERATING SEGMENTS (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Oct. 31, 2012	Jul. 31, 2012	Apr. 30, 2012	Jan. 31, 2012	Oct. 31, 2011	Jul. 31, 2011	Apr. 30, 2011	Jan. 31, 2011	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010
Net sales	$ 242,409	$ 225,969	$ 216,314	$ 212,655	$ 208,919	$ 197,267	$ 184,486	$ 174,219	$ 897,347	$ 764,891	$ 617,020
United States of America [Member]
Net sales									596,922	507,237	423,916
Other Countries [Member]
Net sales									$ 300,425	$ 257,654	$ 193,104