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Marketable Securities (Narrative) (Details)
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9 Months Ended | 12 Months Ended |
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Sep. 30, 2014
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Dec. 31, 2013
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Minimum
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| Available-for-sale maturity period | 3 months | 3 months |
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Maximum
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| Available-for-sale maturity period | 12 months | 12 months |
| X | ||||||||||
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- Definition
Available For Sale Securities Maturity Period No definition available.
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