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Goodwill and Other Intangible Assets - Future Estimated Amortization Expense Related to Amortizable Intangible Assets (Detail) - USD ($)
$ in Thousands
Jan. 31, 2019
Jan. 31, 2018
Jan. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]      
2020 $ 1,861    
2021 1,702    
2022 1,165    
2023 1,067    
2024 919    
Thereafter 3,781    
Net Carrying Amount $ 10,495 $ 8,015 $ 9,012