Quarterly Financial Information (Unaudited) - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |||||||
---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2018 |
Sep. 30, 2018 |
Mar. 31, 2018 |
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|
Quarterly Financial Information Disclosure [Abstract] | |||||||||
Downsizing costs | $ 0.8 | $ 0.8 | $ 0.4 | $ 0.8 | $ 0.8 | ||||
Legal fees | 2.4 | $ 3.5 | 0.9 | $ 1.5 | |||||
Claim settlement reserves | 2.6 | 0.7 | |||||||
Acquisition and merger related expenses | $ 0.7 | $ 2.6 | $ 1.4 | $ 3.6 | $ 0.9 | ||||
Discrete tax expense (benefit) due to Tax Reform Legislation | $ (5.8) | $ 28.2 | $ (5.8) | $ 28.2 | |||||
Discrete tax charges | $ 1.0 |