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Summary of Significant Accounting Policies Basis of Consolidation Policy Additional Information (Details) | 12 Months Ended
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Dec. 31, 2016
Maximum [Member] |
Basis of Consolidation [Abstract] |
Ownership Interest To Use Equity Method | 50.00%
Ownership Interest To Use Cost Method | 20.00%
Minimum [Member] |
Basis of Consolidation [Abstract] |
Ownership Interest to be Held for Consolidation | 50.00%
Noncontrolling Interests [Abstract] |
Ownership Interest to be Held for Consolidation | 50.00%

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- Definition Basis of Consolidation [Abstract] + References No definition available. + Details
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- Definition Ownership Interest to be Held for Consolidation + References No definition available. + Details
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- Definition Entities in which the company has less than 20% investment and where they do not excercise significant influence are accounted for under the cost method. + References No definition available. + Details
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- Definition The equity method of accounting is used for entities in which the company has a 50% or less invesment and exercises significant influence. + References No definition available. + Details
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- References No definition available. + Details
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- Details
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- Details
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