Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details)

v3.19.2
Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Income Tax Contingency [Line Items]          
Effective income tax rates 1.80% (6.50%) 2.70% (8.40%)  
Unrecognized tax benefits $ 0.6   $ 0.6   $ 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          
Income Tax Contingency [Line Items]          
Net operating loss carryforwards         1,100.0
Federal | Indefinite          
Income Tax Contingency [Line Items]          
Net operating loss carryforwards         331.0
State | Indefinite          
Income Tax Contingency [Line Items]          
Net operating loss carryforwards         444.0
State | California | Tax Year 2028          
Income Tax Contingency [Line Items]          
Net operating loss carryforwards         572.2
Other state | Tax Year 2024          
Income Tax Contingency [Line Items]          
Net operating loss carryforwards         $ 535.8