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Fair Value Measurements and Marketable Securities (Details 2) (USD $)
In Thousands, unless otherwise specified |
Jun. 30, 2012
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|---|---|
| Marketable securities with unrealized losses | |
| Marketable securities, in loss position for less than twelve months, Fair Value | $ 33,293 |
| Available-for-sale Securities, Unrealized Loss | (17) |
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Corporate bonds [Member]
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| Marketable securities with unrealized losses | |
| Marketable securities, in loss position for less than twelve months, Fair Value | 16,809 |
| Available-for-sale Securities, Unrealized Loss | (13) |
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U.S. Government Securities [Member]
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| Marketable securities with unrealized losses | |
| Marketable securities, in loss position for less than twelve months, Fair Value | 16,484 |
| Available-for-sale Securities, Unrealized Loss | $ (4) |
| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Amount of the excess of amortized cost basis over fair value of securities that have been in a loss position for less than twelve months for securities categorized neither as held-to-maturity nor trading securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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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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