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Investments in Other Equity Securities (Details) - EDC [Member] - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Oct. 22, 2014
Schedule of Cost-method Investments [Line Items] (Deprecated 2018-01-31) |  |  |
Noncontrolling Interest, Ownership Percentage by Parent |  |  | 18.40%
Cost Method Investments, Original Cost |  |  | $ 3.5
Variable Interest Entity, Not Primary Beneficiary [Member] |  |  |
Schedule of Cost-method Investments [Line Items] (Deprecated 2018-01-31) |  |  |
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount | $ 3.6 | $ 3.6 |
Variable Interest Entity, Measure of Activity, Other, Amount | $ 0.1 | $ 0.1 |

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