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STOCK-BASED COMPENSATION - Narrative (Details)
$ / shares in Units, $ in Thousands
5 Months Ended 7 Months Ended 12 Months Ended
May 25, 2021
USD ($)
May 24, 2021
$ / shares
Dec. 31, 2021
USD ($)
$ / shares
shares
Dec. 31, 2021
USD ($)
plan
shares
Dec. 31, 2020
USD ($)
$ / shares
Dec. 31, 2019
USD ($)
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of plans | plan       1    
Compensation expense       $ 44,893 $ 11,665 $ 5,291
Incremental compensation cost from modification recognized in current period in connection with Spin-off       9,500    
Proceeds from exercise of stock options       $ 3,364 $ 0 $ 0
Incremental compensation cost $ 14,000          
2021 Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Aggregate number of shares covered under the plan (up to) | shares     10,000,000 10,000,000    
Stock Appreciation Rights (SARs) and Restricted Stock Units (RSUs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares available for grant (shares) | shares     8,400,000 8,400,000    
Unrecognized compensation cost, net     $ 78,100 $ 78,100    
Unrecognized compensation cost, period for recognition (in years)       2 years 3 months 18 days    
Stock Appreciation Rights (SARs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period       4 years    
Awards granted (in USD per share) | $ / shares         $ 2.16 $ 2.14
Stock Appreciation Rights (SARs) and Options            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
SARs and Options exercised, intrinsic value       $ 49,400 $ 23,900 $ 600
Restricted Stock Units (RSUs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Awards granted (in USD per share) | $ / shares   $ 35.35 $ 26.11   $ 17.33  
RSUs vested, intrinsic value (less than)       $ 100    
Restricted Stock Units (RSUs) | Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period       1 year    
Restricted Stock Units (RSUs) | Maximum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period       3 years    
Restricted Stock            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Unrecognized compensation cost, net     $ 81,700 $ 81,700    
Unrecognized compensation cost, period for recognition (in years)       8 years 9 months 18 days    
Director | Restricted Stock | Restricted Stock Agreement            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares authorized for issuance (in shares) | shares     4,870,500 4,870,500    
Unrecognized compensation cost, net     $ 87,300 $ 87,300    
IAC | Director | Restricted Stock | Restricted Stock Agreement            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares authorized for issuance (in shares) | shares     3,000,000 3,000,000