XML 41 R31.htm IDEA: XBRL DOCUMENT v3.7.0.1
Goodwill and Other Intangible Assets - Future Estimated Amortization Expense Related to Amortizable Intangible Assets (Detail) - USD ($)
$ in Thousands
Jul. 31, 2017
Jan. 31, 2017
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]    
2018 $ 774  
2019 1,462  
2020 1,462  
2021 1,307  
2022 841  
2023 and thereafter 2,690  
Net Carrying Amount $ 8,536 $ 9,012