Income Taxes (Details) - USD ($) $ in Millions	9 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Sep. 30, 2019
Operating Loss Carryforwards [Line Items]
Effective income tax rate		31.00%	15.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount		$ 1.2
Excess tax benefits on share-based compensation			$ 0.8
Deferred tax assets		8.4
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Income Tax Expense (Benefit), Discreet Tax Provision Charge		$ 3.5
Scenario, Forecast
Operating Loss Carryforwards [Line Items]
Proceeds from Income Tax Refunds	$ 14.0