Income Taxes - Operating Loss Carryforwards (Details) $ in Millions	Dec. 31, 2019 USD ($)
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 90.5
2020-2023
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	0.2
2024-2035
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	15.3
Indefinite
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 75.0