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Other Charges - Accelerated amortization of unamortized deferred financing costs (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of detailed information about borrowings [line items] |  |  |  |
Accelerated amortization of unamortized deferred financing costs |  | $ 1.2 | $ 0.0 | $ 0.0
Prior credit facility |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Accelerated amortization of unamortized deferred financing costs | $ 1.2 |  |  |

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- Definition Accelerated Amortization Of Financing Costs + References No definition available. + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Details
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Balance Type: |
Period Type: |