Quarterly report pursuant to Section 13 or 15(d)

Severance and Other Restructuring Costs - Activity in Accrued Restructuring Liability (Detail)

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Severance and Other Restructuring Costs - Activity in Accrued Restructuring Liability (Detail)
$ in Thousands
 6 Months Ended
Jul. 31, 2017
USD ($)
Restructuring Cost and Reserve [Line Items]  
Accrual balance at the beginning of the period $ 1,023
Restructuring charges incurred 2,497
Cash payments (3,243)
Other charges 16
Accrual balance at the ending of the period 293
Employee-Related Benefits [Member]  
Restructuring Cost and Reserve [Line Items]  
Accrual balance at the beginning of the period 785
Restructuring charges incurred 2,218
Cash payments (2,771)
Other charges 16
Accrual balance at the ending of the period 248
Closure of Leased Facilities [Member]  
Restructuring Cost and Reserve [Line Items]  
Accrual balance at the beginning of the period 130
Restructuring charges incurred 89
Cash payments (232)
Accrual balance at the ending of the period (13)
Other Restructuring [Member]  
Restructuring Cost and Reserve [Line Items]  
Accrual balance at the beginning of the period 108
Restructuring charges incurred 190
Cash payments (240)
Accrual balance at the ending of the period $ 58