Summary of Restructuring Accrual by Expense Category and by Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jan. 31, 2017	Oct. 31, 2016	Jan. 31, 2016	Oct. 31, 2015	Jan. 31, 2017
Restructuring Cost and Reserve [Line Items]
Accrued restructuring, beginning balance		$ 3,029			$ 3,029
Restructuring charges	$ 800	1,400	$ 200	$ 1,000	2,120
Restructuring adjustments					30
Cash paid					(4,016)
Non-cash adjustments					(12)
Accrued restructuring, ending balance	1,151				1,151
Americas
Restructuring Cost and Reserve [Line Items]
Accrued restructuring, beginning balance		862			862
Restructuring charges					480
Restructuring adjustments					6
Cash paid					(907)
Accrued restructuring, ending balance	441				441
Asia
Restructuring Cost and Reserve [Line Items]
Accrued restructuring, beginning balance		894			894
Restructuring charges					854
Cash paid					(1,464)
Non-cash adjustments					(4)
Accrued restructuring, ending balance	280				280
Europe
Restructuring Cost and Reserve [Line Items]
Accrued restructuring, beginning balance		398			398
Restructuring charges					668
Restructuring adjustments					25
Cash paid					(854)
Non-cash adjustments					(8)
Accrued restructuring, ending balance	229				229
e-Business Services
Restructuring Cost and Reserve [Line Items]
Accrued restructuring, beginning balance		875			875
Restructuring charges					118
Restructuring adjustments					(1)
Cash paid					(791)
Accrued restructuring, ending balance	201				201
Employee-related Costs
Restructuring Cost and Reserve [Line Items]
Accrued restructuring, beginning balance		2,074			2,074
Restructuring charges					1,723
Restructuring adjustments					42
Cash paid					(2,997)
Non-cash adjustments					(18)
Accrued restructuring, ending balance	824				824
Employee-related Costs | Americas
Restructuring Cost and Reserve [Line Items]
Restructuring charges	200	200	100	800
Employee-related Costs | Asia
Restructuring Cost and Reserve [Line Items]
Restructuring charges	300	400		$ 300
Employee-related Costs | Europe
Restructuring Cost and Reserve [Line Items]
Restructuring charges	100	500	$ 100
Employee-related Costs | e-Business Services
Restructuring Cost and Reserve [Line Items]
Restructuring charges	100
Contractual Obligations
Restructuring Cost and Reserve [Line Items]
Accrued restructuring, beginning balance		955			955
Restructuring charges	100	$ 300			397
Restructuring adjustments					(12)
Cash paid					(1,019)
Non-cash adjustments					6
Accrued restructuring, ending balance	$ 327				$ 327