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, unless otherwise specified |
Jan. 31, 2015
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Jan. 31, 2014
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Investments Debt And Equity Securities [Abstract] | ||
Due in one year or less | $ 224,263us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue | $ 17,667us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue |
Due in greater than one year | 44,357us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue | 7,958us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue |
Available-for-sale securities, Estimated Fair Value | $ 268,620us-gaap_AvailableForSaleSecuritiesCurrent | $ 25,625us-gaap_AvailableForSaleSecuritiesCurrent |
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- Definition
Amount of investment in debt and equity securities categorized neither as trading securities nor held-to-maturity securities and intended be sold or mature one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Fair value of available-for-sale debt securities maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Fair value of available-for-sale debt securities maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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