v3.26.1
STOCK-BASED COMPENSATION - Narrative (Details)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Feb. 02, 2026
USD ($)
shares
Mar. 31, 2025
shares
Jan. 13, 2025
USD ($)
shares
Apr. 15, 2025
$ / shares
shares
Mar. 31, 2025
USD ($)
shares
Mar. 30, 2025
$ / shares
shares
Dec. 31, 2025
USD ($)
installment
$ / shares
shares
Dec. 31, 2025
USD ($)
installment
plan
$ / shares
shares
Dec. 31, 2024
USD ($)
$ / shares
shares
Dec. 31, 2023
USD ($)
$ / shares
shares
Nov. 05, 2020
shares
Share-based Compensation Arrangement by Share-based Payment Award                      
Number of active stock-based compensation plans | plan               1      
Shares available for grant (in shares) | shares             28,000,000.0 28,000,000.0      
Taxes withholding obligations paid               $ 79,922,000 $ 14,976,000 $ 10,587,000  
Total stock-based compensation expense               27,904,000 73,159,000 69,062,000  
Intrinsic value of stock options exercised               65,900,000 5,100,000 11,300,000  
Options outstanding, aggregate intrinsic value             $ 12,121,000 12,121,000      
Unrecognized compensation cost, net of estimated forfeitures             $ 67,200,000 $ 67,200,000      
Weighted-average period over which cost is expected to be recognized (in years)               1 year 9 months 18 days      
Tax benefit recognized related to stock-based compensation               $ 12,700,000 10,600,000 12,700,000  
Tax benefit recognized related to the exercise of stock options               $ 5,800,000 $ 2,100,000 $ 3,400,000  
Restricted Stock Units (RSUs)                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Granted (in shares) | shares       562,000   449,000 738,000        
Equity instruments other than options, outstanding (in shares) | shares   2,134,000     2,134,000 1,758,000 2,601,000 2,601,000 1,708,000    
Award conversion ratio   1.2138                  
Number of shares required to settle vested and unvested interests at fair value (in shares) | shares 1,400,000                    
Cash withholding obligation $ 47,000,000.0                    
Withholding rate (as a percent) 50.00%                    
Weighted average grant date fair value of restricted common stock granted (in USD per share) | $ / shares       $ 33.77   $ 42.29 $ 34.15 $ 36.72 $ 51.29 $ 53.41  
Fair value of RSUs that vested during the period               $ 44,500,000 $ 26,800,000 $ 8,300,000  
Restricted Stock Units (RSUs) | Minimum                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Vesting period (in years)               3 years      
Restricted Stock Units (RSUs) | Maximum                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Vesting period (in years)               4 years      
Performance Shares                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Number of vesting installments | installment             3 3      
Granted (in shares) | shares       0   0 210,000        
Equity instruments other than options, outstanding (in shares) | shares   0     0 0 210,000 210,000 0    
Weighted average grant date fair value of restricted common stock granted (in USD per share) | $ / shares       $ 0   $ 0 $ 33.77 $ 36.72 $ 51.29 $ 53.41  
Fair value of RSUs that vested during the period               $ 0      
Market-Based Stock Units                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Granted (in shares) | shares               0 0 0  
Equity instruments other than options, outstanding (in shares) | shares             0 0 0 0  
Share-based Payment Arrangement, Option                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Award conversion ratio   1.2138                  
Number of shares required to settle vested and unvested interests at fair value (in shares) | shares 400,000                    
Cash withholding obligation $ 4,800,000                    
Withholding rate (as a percent) 50.00%                    
Options outstanding, aggregate intrinsic value $ 9,600,000                    
Cash withholding obligation equivalent (in shares) | shares 100,000                    
Proceeds from the exercise of stock options $ 4,400,000                    
Subsidiary Denominated Equity Awards                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Intrinsic value $ 0                    
Old IAC Plan                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Stated term (in years)               10 years      
RSA Agreement | Restricted Stock                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Stock based compensation expense         $ (60,000,000.0)            
Total stock-based compensation expense         100,000            
RSA Agreement | Restricted Stock | Angi Inc.                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Stock based compensation expense         (10,200,000)            
RSA Agreement | Chief Executive Officer                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Shares transferred (in shares) | shares     5,000,000.0                
Taxes withholding obligations paid     $ 9,300,000                
RSA Agreement | Chief Executive Officer | Restricted Stock                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Shares authorized for issuance (in shares) | shares                     3,000,000.0
Total stock-based compensation expense         $ 14,900,000