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Acquisitions - Summary of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions | Mar. 31, 2019 | Jan. 11, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Goodwill | $ 363.8 |  | $ 338.0
Presque Isle |  |  |
Business Acquisition [Line Items] |  |  |
Current assets |  | $ 2.5 |
Property and equipment |  | 78.5 |
Goodwill |  | 25.8 |
Intangible assets |  | 71.2 |
Current liabilities |  | (6.1) |
Non-current liabilities |  | (0.6) |
Assets acquired and liabilities assumed |  | $ 171.3 |

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