Income Taxes - Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Income Taxes [Line Items]
CARES Act, Operating loss carryforward, period	5 years
CARES Act, operating loss carryforward, maximum taxable income offset (in percent)	1
Income tax benefit	$ 13.3
Income tax expense recognized from the re-measurement of net deferred tax liabilities	1.9	$ 8.3
Capital loss	29.0	0.0
Unrecognized tax benefits	3.9	$ 1.8	$ 2.8	$ 2.9
Interest	0.2
Unrecognized tax benefits that would impact effective tax rate	3.4
Anticipated decrease in unrecognized tax positions	0.8
Federal
Income Taxes [Line Items]
Operating loss carryforwards	3.2
State
Income Taxes [Line Items]
Operating loss carryforwards	7.3
Operating loss carryforwards, valuation allowance	$ 1.1