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Stock-Based Compensation - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Feb. 01, 2022
Jan. 31, 2022
Jan. 27, 2021
Jan. 28, 2019
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Restricted Stock Units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Performance-based restricted stock granted (in shares)             487,215    
Weighted average fair value per share (in dollars per share)         $ 8.06   $ 8.06   $ 5.91
Vested in period (in shares)             325,771    
Performance Stock Units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Performance-based restricted stock granted (in shares)             472,485    
Weighted average fair value per share (in dollars per share)         $ 10.20   $ 10.20   $ 8.42
Share-based compensation liability related to PSUs         $ 12.9   $ 12.9   $ 6.3
Vested in period (in shares)             608,125    
Performance Stock Units | Minimum                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Relative total shareholder return, percentage             0.00%    
Performance Stock Units | Maximum                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Relative total shareholder return, percentage             200.00%    
2014 Plan | Restricted Stock Units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of shares authorized to be issued under the plan (in shares)         12,000,000   12,000,000    
Unrecognized compensation expense related to unvested stock         $ 8.4   $ 8.4    
Weighted average remaining vesting period of unrecognized compensation expense             1 year 1 month 2 days    
Stock-based compensation expense         1.5 $ 1.2 $ 2.7 $ 2.7  
2014 Plan | Restricted Stock Units | Bold Contribution Agreement | Class A Common Stock                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of shares of common stock that each holder has contingent right to receive (in shares)             1    
2014 Plan | Performance Stock Units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Stock-based compensation expense         $ 4.5 $ 3.2 $ 9.1 $ 5.0  
Performance-based restricted stock granted (in shares) 472,485     669,550          
Risk-free interest rate             1.40%    
Expected volatility (as a percent)             86.00%    
Weighted average fair value per share (in dollars per share)         $ 19.42   $ 19.42    
Vested in period (in shares)   608,125              
Settlement rate   197.00%              
Settlement rate in common stock   100.00%              
Unrecognized compensation expense related to PSU awards         $ 22.5   $ 22.5    
Remaining vesting period of unrecognized compensation expense (in years)             11 months 8 days    
2014 Plan | Class A Common Stock                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Issuance of shares of class A common stock (in shares)   608,125              
2021 PSUs | Performance Stock Units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Performance-based restricted stock granted (in shares)     1,099,800