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