Segment and Entity Wide Disclosures - Customer Concentration (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Revenue, Major Customer [Line Items]
Revenues	$ 3,094,286	$ 2,801,687	$ 2,600,573
Revenue
Revenue, Major Customer [Line Items]
Percent of revenue	56.50%	55.60%	51.10%
Customer Concentration Risk | Sales Revenue, Goods, Net
Revenue, Major Customer [Line Items]
Revenues	$ 692,589	$ 736,991	$ 479,077
Customer Concentration Risk | Sales Revenue, Goods, Net | AT&T
Revenue, Major Customer [Line Items]
Revenues	374,576	448,943	$ 479,077
Customer Concentration Risk | Sales Revenue, Goods, Net | Verizon
Revenue, Major Customer [Line Items]
Revenues	$ 318,013	$ 288,048