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Fair Value (Schedule Of Long-Term Investments Measured At Fair Value) (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | |
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Mar. 31, 2014
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Mar. 31, 2013
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| Fair Value [Abstract] | ||
| Balance as of January 1 | $ 9,921 | $ 10,324 |
| Net unrealized losses included in other comprehensive loss | (9) | (8) |
| Sales of investments at par value | (6) | (25) |
| Balance as of March 31 | 9,906 | 10,291 |
| Unrealized losses still held as of March 31 | $ 1,442 | $ 1,859 |
| X | ||||||||||
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- Definition
Amount of unrealized loss before deducting unrealized gain on investments in available-for-sale securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Amount of gain (loss) recognized in other comprehensive income (loss) for financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of sale of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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