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Related Party Transactions (Details) - Executive Chairman - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2015 | Dec. 31, 2018 | Dec. 31, 2017
Related Party Transaction [Line Items] |  |  |
Charge to selling, general and administrative expense | $ 18.3 |  |
Accrued Liabilities and Other Long Term Liabilities |  |  |
Related Party Transaction [Line Items] |  |  |
Balance due to related parties |  | $ 15.7 | $ 16.8

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