Income Taxes (Schedule of Income Before Income Tax, Domestic Foreign) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 31, 2015	Jul. 31, 2015	Apr. 30, 2015	Jan. 31, 2015	Oct. 31, 2014	Jul. 31, 2014	Apr. 30, 2014	Jan. 31, 2014	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2013
Income (loss) before income taxes:
United States									$ 31,900	$ 32,500	$ 38,900
Foreign									183,600	264,000	273,400
Income before income taxes	$ 36,400	$ 44,600	$ 67,000	$ 67,500	$ 34,900	$ 94,400	$ 87,800	$ 79,500	215,485	296,534	312,271
Income tax provision									$ 10,341	$ 24,705	$ 15,365