XML 73 R57.htm IDEA: XBRL DOCUMENT v3.3.1.900
Goodwill and Other Intangible Assets - Future Estimated Amortization Expense Related to Amortizable Intangible Assets (Detail) - USD ($)
$ in Thousands
Jan. 31, 2016
Jan. 31, 2015
Jan. 31, 2014
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]      
2017 $ 1,457    
2018 1,418    
2019 1,418    
2020 1,418    
2021 1,267    
Thereafter 3,488    
Net Carrying Amount $ 10,466 $ 10,831 $ 3,201