Annual report [Section 13 and 15(d), not S-K Item 405]

STOCK-BASED COMPENSATION - Narrative (Details)

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STOCK-BASED COMPENSATION - Narrative (Details)
shares in Thousands, $ in Thousands
 12 Months Ended
Jun. 21, 2021
plan
Jun. 17, 2021
Dec. 31, 2024
USD ($)
shares
Dec. 31, 2023
USD ($)
shares
Dec. 31, 2022
shares
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]          
Number of plans | plan 2        
Options outstanding (shares) | shares     5,070 5,395 9,222
Unrecognized compensation expense     $ 0    
Stock-based compensation expense     $ 18,113 $ 18,722  
Class A common stock          
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]          
Options outstanding (shares) | shares     3,200    
Common Class B          
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]          
Options outstanding (shares) | shares     1,900    
2011 Plan          
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]          
Maximum annual increase in number of shares of common stock issued and outstanding   5.00%      
2021 Equity Incentive Plan | Class A common stock          
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]          
Common stock, reserved for future issuance (shares) | shares     37,500    
Shares available for award (shares) | shares     13,500    
Stock options | 2011 Plan          
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]          
Maximum term     10 years    
Stock options | 2011 Plan | Minimum          
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]          
Vesting period     3 years    
Stock options | 2011 Plan | Maximum          
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]          
Vesting period     4 years    
Restricted stock units          
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]          
Total unrecognized compensation expense     $ 26,400    
Remaining average period cost expected to be recognized over     2 years 1 month 6 days    
Intrinsic value of RSUs vested     $ 12,400 $ 12,400  
Restricted stock units | Minimum          
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]          
Vesting period     3 years    
Restricted stock units | Maximum          
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]          
Vesting period     4 years    
Performance Stock Units          
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]          
Vesting period     1 year    
Total unrecognized compensation expense     $ 0    
Stock-based compensation expense     $ 0