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Derivative Financial Instruments and Risk Management - Schedule of Impact of the Derivative Instruments in the Condensed Consolidated Financial Statements (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jan. 31, 2019 | Jan. 31, 2018
Cross Currency Interest Rate Swap [Member] | Other Long Term Liabilities [Member] |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Cross-currency interest rate swap | $ 600 | $ 1,513
Interest Rate Swap [Member] | Other Assets [Member] |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Interest rate swap | 85 | 101
Cash Flow Hedge [Member] | Cross Currency Interest Rate Contract [Member] |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Amount of Gain (Loss) Recognized in OCI on Derivative | $ 797 | (1,330)
Location of Gain (Loss) Reclassified from Accumulated OCI into Income | Other Income (Expense) |
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income | $ 769 | $ (1,344)

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