Geographic Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Oct. 31, 2017
Geographic Information About Revenues and Long-Lived Assets [Line Items]
Revenue	$ 421,412	$ 354,959
US [Member]
Geographic Information About Revenues and Long-Lived Assets [Line Items]
Revenue	404,399	340,560
Long-Lived Assets	47,235		$ 46,804
Non-US [Member]
Geographic Information About Revenues and Long-Lived Assets [Line Items]
Revenue	17,013	14,399
Long-Lived Assets	2,457		2,185
Total [Member]
Geographic Information About Revenues and Long-Lived Assets [Line Items]
Revenue	421,412	$ 354,959
Long-Lived Assets	$ 49,692		$ 48,989