Income Taxes - Narrative (Details) - USD ($) $ in Thousands |
12 Months Ended | |||
|---|---|---|---|---|
Apr. 02, 2020 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
|
| Income Tax [Line Items] | ||||
| US Federal Net Operating Loss Carryover, Subject to Expiration [Line Items] | $ 417,400 | |||
| Domestic Tax Authority | ||||
| Income Tax [Line Items] | ||||
| Operating loss carryforwards | 496,300 | |||
| State | ||||
| Income Tax [Line Items] | ||||
| Operating loss carryforwards | 93,200 | |||
| Conversion of common shares from Class C to Class A | Common Class A | ||||
| Income Tax [Line Items] | ||||
| Conversion of Convertible Securities, Income Tax Expense (Benefit) | $ 2,200 | $ 2,200 | $ 17,500 | $ 7,200 |