Fair Value Measurements and Marketable Securities - Marketable Securities with Unrealized Losses (Detail) (USD $)
In Thousands, unless otherwise specified |
Jun. 30, 2014
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Schedule Of Available For Sale Securities [Line Items] | |
Marketable securities, in loss position for less than twelve months, Fair Value | $ 20,269 |
Marketable securities, in loss position for less than twelve months, Unrealized Loss | (6) |
U. S. Government Securities
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|
Schedule Of Available For Sale Securities [Line Items] | |
Marketable securities, in loss position for less than twelve months, Fair Value | 8,010 |
Marketable securities, in loss position for less than twelve months, Unrealized Loss | (1) |
Corporate Debt Securities
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|
Schedule Of Available For Sale Securities [Line Items] | |
Marketable securities, in loss position for less than twelve months, Fair Value | 12,259 |
Marketable securities, in loss position for less than twelve months, Unrealized Loss | $ (5) |