Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Line Items]
Net deferred tax asset	$ 900,000	$ 600,000
Income tax receivable	1,900,000	1,600,000
Net operating loss carryforwards	753,100,000
Valuation allowance	305,600,000	334,000,000.0
Deferred income tax benefit	14,600,000	0	$ 0
Unrecognized tax benefits that would impact effective tax rate	3,300,000	9,800,000
Tax audit settlement expense	0
Accrued penalties related to uncertain tax positions	0	$ 0
Amount by which unrecognized tax benefits may decrease over the next 12 months	700,000
Tax Year Prior to 2018
Income Tax Disclosure [Line Items]
Net operating loss carryforwards	$ 684,600,000
Tax Year 2030
Income Tax Disclosure [Line Items]
Net operating loss carryforwards, expiration year	2030
Tax Year 2037
Income Tax Disclosure [Line Items]
Net operating loss carryforwards, expiration year	2037
Tax Year 2027 | General Business and Other Credit Carryforwards
Income Tax Disclosure [Line Items]
Foreign tax credit carryforwards, subject to expiration, year	2027
Tax Year 2031 | General Business and Other Credit Carryforwards
Income Tax Disclosure [Line Items]
Foreign tax credit carryforwards, subject to expiration, year	2031
Tax Year 2010 | State
Income Tax Disclosure [Line Items]
State audits of tax under examination, year	2010
Tax Year 2011 | State
Income Tax Disclosure [Line Items]
State audits of tax under examination, year	2011
Tax Year 2012 | State
Income Tax Disclosure [Line Items]
State audits of tax under examination, year	2012
Tax Year 2013 | State
Income Tax Disclosure [Line Items]
State audits of tax under examination, year	2013
Tax Year 2014 | State
Income Tax Disclosure [Line Items]
State audits of tax under examination, year	2014