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Fair Value Measurements (Assets Held For Sale) (Details) - Fair Value, Nonrecurring $ in Thousands | Dec. 31, 2015 USD ($)
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
BrightVolt investment | $ 341
Level 1 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
BrightVolt investment | 0
Level 2 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
BrightVolt investment | 0
Level 3 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
BrightVolt investment | $ 341

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