Condensed Consolidated Statements of Comprehensive Income (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 Income And Comprehensive Income [Abstract]
Net income	$ 77,879	$ 65,424	$ 174,693	$ 162,040
Components of other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(4,769)	(5,133)	(3,517)	(9,716)
Amortization of prior service cost and net actuarial losses	1,722	2,687	5,180	8,213
Total other comprehensive income (loss)	(3,047)	(2,446)	1,663	(1,503)
Total comprehensive income	$ 74,832	$ 62,978	$ 176,356	$ 160,537