Quarterly report pursuant to Section 13 or 15(d)

Severance and Other Restructuring Costs - Additional Information (Detail)

v3.3.1.900
Severance and Other Restructuring Costs - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Oct. 31, 2015
Oct. 31, 2014
Oct. 31, 2015
Oct. 31, 2014
Restructuring and Related Activities [Abstract]        
Restructuring charges $ 197 $ 1,186 $ 1,026 $ 1,878