Short-Term Investments - Summary of Estimated Fair Value of Short-Term Investments, Designated as Available-for-Sale and Classified by Contractual Maturity (Detail) - USD ($) $ in Thousands |
Jan. 31, 2019 |
Jan. 31, 2018 |
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Investments Debt And Equity Securities [Abstract] | |||||
Due in one year or less | $ 377,858 | $ 308,172 | |||
Due in greater than one year | 161,332 | 133,607 | |||
Total | $ 539,190 | $ 441,779 | [1] | ||
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- Definition Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), maturing in next fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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