Income Taxes - Tax Reform (Details) $ in Millions |
12 Months Ended |
---|---|
Dec. 31, 2017
USD ($)
| |
Income Tax Disclosure [Abstract] | |
Income tax benefit | $ 9.9 |
Provisional impact related to remeasuring deferred taxes | 31.0 |
Offsetting tax benefit of remeasured valuation allowance | 31.0 |
Provisional reduction to NOLs | $ 102.6 |