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Recent Accounting Pronouncements (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
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Sep. 30, 2017 | Sep. 30, 2017
Recent Accounting Pronouncements [Abstract] |  |
Possible income tax expense reduction | $ 0.2 | $ 2.0

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- Definition Income Tax Expense Potential Reduction + References No definition available. + Details
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- References No definition available. + Details
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