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Financial Instruments and Marketable Securities (Future Maturities Of Available-For-Sale Securities) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013
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Schedule of Available-for-sale Securities [Line Items] |
Available-for-sale Securities, Amortized Cost, Maturities Less Than Twelve Months | $ 197
Available-for-sale Securities, Fair Value, Maturities Less Than Twelve Months | 451
Available-for-sale Securities, Amortized Cost, Maturities Greater Than Twelve Months | 0
Available-for-sale Securities, Fair Value, Maturities Greater Than Twelve Months | 0
Common Stock |
Schedule of Available-for-sale Securities [Line Items] |
Available-for-sale Securities, Amortized Cost, Maturities Less Than Twelve Months | 197
Available-for-sale Securities, Fair Value, Maturities Less Than Twelve Months | 451
Available-for-sale Securities, Amortized Cost, Maturities Greater Than Twelve Months | 0
Available-for-sale Securities, Fair Value, Maturities Greater Than Twelve Months | $ 0

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