Fair Value (Schedule Of Long-Term Investments Measured At Fair Value) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
Jun. 30, 2014	Jun. 30, 2013
Fair Value [Abstract]
Balance as of January 1	$ 9,921	$ 10,324
Net unrealized losses included in other comprehensive loss	(154)	276
Sales of investments at par value	(57)	(25)
Balance as of June 30	9,710	10,575
Unrealized losses still held as of June 30	$ 1,587	$ 1,575

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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-Name Accounting Standards Codification

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

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