Income Taxes - Schedule of Operating Loss and Tax Credit Carryforwards (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Tax Credit Carryforward [Line Items]
Deferred tax assets after valuation allowance	$ 250,603	$ 254,624
Federal loss carryforwards	43,774	49,821
State loss carryforwards	1,186	$ 7,225
Domestic Tax Authority
Tax Credit Carryforward [Line Items]
Deferred tax assets after valuation allowance	43,800
Domestic Tax Authority | Expiring 2028-2033
Tax Credit Carryforward [Line Items]
Federal loss carryforwards	43,774
State and Local Jurisdiction
Tax Credit Carryforward [Line Items]
Deferred tax assets after valuation allowance	1,200
State and Local Jurisdiction | Expiring 2020-2022
Tax Credit Carryforward [Line Items]
State loss carryforwards	62
State and Local Jurisdiction | Expiring 2025-2035
Tax Credit Carryforward [Line Items]
State loss carryforwards	$ 1,124