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Stock-Based Compensation - Assumptions for Liability Awards (Details)
6 Months Ended
Jun. 30, 2021
Cash-settled Restricted Stock  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Simulations 10,000,000
Expected stock volatility 69.80%
Dividend yield 0.00%
Risk-free interest rate 0.30%
Cash-settled Performance Stock  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Simulations 10,000,000
Expected stock volatility 72.30%
Dividend yield 0.00%
Risk-free interest rate 0.30%