Quarterly report pursuant to Section 13 or 15(d)

Severance and Restructuring Costs - Additional Information (Detail)

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Severance and Restructuring Costs - Additional Information (Detail) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Oct. 31, 2019
Oct. 31, 2019
Oct. 31, 2018
Oct. 31, 2019
Oct. 31, 2018
Restructuring Cost and Reserve [Line Items]          
Severance and restructuring costs   $ 2,282 $ 1,030 $ 3,152 $ 1,620
Total restructuring charges incurred       $ 3,031  
2019 Restructuring Program [Member]          
Restructuring Cost and Reserve [Line Items]          
Total restructuring charges incurred $ 1,900