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Long-term Debt - Textual (Details) - USD ($) $ in Millions |  |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | ---
Jun. 07, 2019 | May 06, 2019 | Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Jan. 01, 2019
Debt Instrument [Line Items] |  |  |  |  |  |  |
Finance lease obligations |  |  | $ 395.2 |  | $ 395.2 |  |
Loss on early extinguishment of debt |  |  | $ (2.3) | $ 0.0 | $ (2.3) | $ 0.0 |
5.75% Senior Notes Due 2024 [Member] | Senior Notes [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Redemption price percentage | 101.917% |  |  |  |  |  |
Total cash outlay | $ 102.0 |  |  |  |  |  |
Loss on early extinguishment of debt | $ 2.3 |  |  |  |  |  |
Senior Notes [Member] | 5.75% Senior Notes Due 2024 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Redemption amount |  | $ 100.0 |  |  |  |  |
Adoption of ASC 842 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Finance lease obligations |  |  |  |  |  |  | $ 83.0

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