Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Taxes [Line Items]
Three-year cumulative pretax income	$ 658,200,000
Increase in valuation allowance	46,800,000
Tax benefit associated with net operating loss carryforwards	78,300,000
Tax reserves, interest and penalties related to current year tax positions	0
Tax reserves, interest and penalties related to prior year tax positions	1,900,000
Reversal of previously recorded tax reserves and accrued interest for tax positions settled and/or closed	1,000,000.0
Unrecognized tax benefits	38,200,000	$ 37,200,000
Net tax expense in connection with uncertain tax positions	900,000
Tax positions that, if reversed, would affect the effective tax rate	30,200,000	29,400,000
Interest and penalties recognized, net of deferred taxes	500,000	100,000	$ 500,000
Reductions in previously accrued interest and penalties	100,000	0
Prepaid income taxes	52,700,000	22,200,000
Domestic
Income Taxes [Line Items]
Net operating loss carryforwards	148,100,000	$ 120,300,000
State
Income Taxes [Line Items]
Net operating loss carryforwards	1,332,000,000.0
Net operating loss carryforwards, valuation allowance	$ 60,200,000