Fair Value Measurements and Marketable Securities - Marketable Securities with Unrealized Losses (Detail) (USD $)
In Thousands, unless otherwise specified |
Mar. 31, 2015
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Schedule Of Available For Sale Securities [Line Items] | |
Marketable securities, in loss position for less than twelve months, Fair Value | $ 34,181us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue |
Marketable securities, in loss position for less than twelve months, Unrealized Loss | (21)us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss |
U.S. Government Securities | |
Schedule Of Available For Sale Securities [Line Items] | |
Marketable securities, in loss position for less than twelve months, Fair Value |
12,170us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue / us-gaap_FairValueByAssetClassAxis = us-gaap_USGovernmentDebtSecuritiesMember |
Marketable securities, in loss position for less than twelve months, Unrealized Loss |
(2)us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss / us-gaap_FairValueByAssetClassAxis = us-gaap_USGovernmentDebtSecuritiesMember |
Corporate Debt Securities | |
Schedule Of Available For Sale Securities [Line Items] | |
Marketable securities, in loss position for less than twelve months, Fair Value |
22,011us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue / us-gaap_FairValueByAssetClassAxis = us-gaap_CorporateDebtSecuritiesMember |
Marketable securities, in loss position for less than twelve months, Unrealized Loss |
$ (19)us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss / us-gaap_FairValueByAssetClassAxis = us-gaap_CorporateDebtSecuritiesMember |
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- Definition
Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for less than twelve months. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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