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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Oct. 31, 2011
Oct. 31, 2010
Oct. 31, 2009
Realized losses gains on derivative instruments reclassified into operations, tax $ 3 $ 11 $ (366)
Unrealized gain (loss) of derivative instruments, tax $ (283)   $ (2,008)