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Nature of Operations and Principles of Consolidation Principles of Consolidation (Details) | Dec. 31, 2013
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Principles of Consolidation [Abstract] |
Minimum Ownership Percentage Of Investments In Affiliates Required To Be Accounted For Under The Equity Method | 20.00%
Maximum Ownership Percentage Of Investments In Affiliates Required To Be Accounted For Under The Equity Method | 50.00%

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