Restructuring (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	9 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Apr. 30, 2019	Jul. 31, 2019	Jul. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 3,905	$ 1,965		$ 11,371	$ 4,962
Restructuring Reserve [Roll Forward]
Beginning Balance			$ 615	615
Restructuring Expense				11,371
Payments				9,761
Ending Balance	2,225			2,225
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs			22,761
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	947			2,377	2,931
Restructuring Reserve [Roll Forward]
Beginning Balance			367	367
Restructuring Expense				2,377
Payments		1,352		2,744
Ending Balance	0			0
Legal and Professional Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	2,608			6,769	1,170
Restructuring Reserve [Roll Forward]
Beginning Balance			248	248
Restructuring Expense				6,769
Payments		58		4,792
Ending Balance	2,225			2,225
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	350			2,225	$ 861
Restructuring Reserve [Roll Forward]
Beginning Balance			$ 0	0
Restructuring Expense				2,225
Payments		$ 555		2,225
Ending Balance	$ 0			$ 0