Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details)

v3.19.3
Income Taxes (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Income Tax Contingency [Line Items]          
Effective income tax rates (4.80%) 11.20% (0.10%) (3.20%)  
Unrecognized tax benefits $ 0.0   $ 0.0   $ 0.6
Unrecognized tax benefits, reduction resulting from lapse of applicable statute of limitations 0.6   0.6    
Unrecognized tax benefits income tax penalties and interest accrued $ 0.2   $ 0.2    
Federal | Tax year 2028 begin to expire          
Income Tax Contingency [Line Items]          
Net operating loss carryforwards         769.0
Federal | Indefinite          
Income Tax Contingency [Line Items]          
Net operating loss carryforwards         331.0
State | Tax year 2024 begin to expire          
Income Tax Contingency [Line Items]          
Net operating loss carryforwards         664.0
State | Indefinite          
Income Tax Contingency [Line Items]          
Net operating loss carryforwards         $ 444.0