Condensed Consolidated Statements of Comprehensive Income/(Loss) (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013
Statement of Comprehensive Income [Abstract]
Reclassification adjustment from AOCI on derivatives, tax	$ (92)	$ (1,447)	$ (126)	$ (2,956)
Unrealized gain/(loss) on derivative instruments, tax	$ 6,002	$ 840	$ 5,913	$ 1,381