Assets and Liabilities Held for Sale (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
	Mar. 06, 2017	Apr. 30, 2017	Jul. 30, 2017	Jul. 31, 2016	Oct. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestitures			$ 15,224	$ 36,648
Assets included as part of continuing operations
Trade accounts receivable, net			483		$ 13,553
Recoverable income taxes			0		15
Other assets			203		3,339
Property, equipment and software, net			12		178
Purchased intangible assets			0		495
Total major classes of assets as part of continuing operations			698		17,580
Liabilities included as part of continuing operations
Accrued compensation			0		2,432
Accounts payable			136		921
Accrued taxes other than income taxes			0		833
Accrued insurance and other			210		1,574
Total major classes of liabilities as part of continuing operations			346		$ 5,760
Disposed of by Sale | Maintech Holdings, LLC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestitures	$ 18,300
Working capital adjustment	$ 100
Working capital adjustment determination period	60 days
Proceeds from transaction, net	$ 13,100
Closure of foreign subsidiary		$ 3,900
Net assets and liabilities with title transfer pending			$ 400
Duration after sale to document transfer of assets and liabilities			12 months
Duration after sale company will provide accounting and operational services			6 months
Service agreement term			3 years