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Schedule of Unrecognized Compensation Cost and Weighted Average Period of Recognition (Detail) $ in Thousands | 3 Months Ended
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Apr. 30, 2021 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |
Unrecognized Compensation Cost | $ 59,009
Performance Stock Units (PSUs) |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |
Unrecognized Compensation Cost | $ 9,563
Weighted Average Years | 2 years 9 months 18 days
Restricted Stock Units (RSUs) |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |
Unrecognized Compensation Cost | $ 49,446
Weighted Average Years | 2 years 6 months

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