Business Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 31, 2017	Jul. 31, 2017	Apr. 30, 2017	Jan. 31, 2017	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2016	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Segment Reporting Information [Line Items]
Net revenues	$ 264,170	$ 256,847	$ 273,031	$ 247,938	$ 281,683	$ 248,832	$ 284,264	$ 251,055	$ 1,041,986	$ 1,065,834	$ 1,073,052
Long-Lived Assets	309,775				310,606				309,775	310,606	326,758
Reportable Geographical Components [Member] | United States
Segment Reporting Information [Line Items]
Net revenues									839,013	888,164	901,182
Long-Lived Assets	235,663				243,225				235,663	243,225	265,579
Reportable Geographical Components [Member] | Europe
Segment Reporting Information [Line Items]
Net revenues									169,398	143,281	132,094
Long-Lived Assets	53,569				48,709				53,569	48,709	41,695
Reportable Geographical Components [Member] | Rest of World
Segment Reporting Information [Line Items]
Net revenues									33,575	34,389	39,776
Long-Lived Assets	$ 20,543				$ 18,672				$ 20,543	$ 18,672	$ 19,484
Sales [Member] | Rest of World
Segment Reporting Information [Line Items]
Concentration Risk, Percentage									19.50%	16.70%	15.90%