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Equity - Narrative (Details)
$ / shares in Units, $ in Thousands
 1 Months Ended 2 Months Ended 3 Months Ended 5 Months Ended 9 Months Ended 12 Months Ended
Oct. 26, 2023
USD ($)
Jun. 01, 2023
USD ($)
Oct. 28, 2022
USD ($)
Jun. 08, 2021
vote
$ / shares
shares
Oct. 31, 2021
USD ($)
Year
$ / shares
shares
Dec. 31, 2023
USD ($)
class
equityIncentivePlan
$ / shares
shares
Dec. 31, 2023
USD ($)
class
equityIncentivePlan
$ / shares
shares
Dec. 31, 2022
USD ($)
Sep. 30, 2022
USD ($)
shares
Dec. 31, 2023
USD ($)
class
equityIncentivePlan
$ / shares
shares
Dec. 31, 2022
USD ($)
shares
Oct. 31, 2023
USD ($)
shares
Mar. 31, 2018
shares
Mar. 31, 2023
$ / shares
shares
May 12, 2022
USD ($)
Jun. 30, 2021
$ / shares
shares
Mar. 31, 2017
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Preferred stock, authorized (in shares)           100,000,000 100,000,000     100,000,000       100,000,000   100,000,000  
Preferred stock, par value (in dollars per share) | $ / shares           $ 0.001 $ 0.001     $ 0.001       $ 0.001   $ 0.001  
Preferred stock, issued (in shares)           0 0     0       0      
Preferred stock, outstanding (in shares)           0 0     0       0      
Number of classes of common stock | class           2 2     2              
Common stock, authorized (in shares)           1,500,000,000 1,500,000,000     1,500,000,000       1,500,000,000      
Common stock, par value (in dollars per share) | $ / shares           $ 0.001 $ 0.001     $ 0.001       $ 0.001      
Common stock, outstanding (in shares)           186,175,000 186,175,000     186,175,000       193,941,000      
Stock repurchase program, authorized amount | $ $ 70,000 $ 200,000 $ 70,000                       $ 70,000    
Stock repurchase program, period in force 12 months 24 months 12 months                            
Repurchase and retirement of common stock (in shares)           331,960     2,150,982     11,639,553          
Repurchase and retirement of common stock | $           $ 8,000 $ 72,359   $ 70,000 $ 263,827 $ 70,042 $ 270,000          
Repurchase and retirement of common stock, excise taxes | $                   1,600              
Stock repurchase program, remaining authorized repurchase amount | $           $ 62,000 $ 62,000     $ 62,000              
Number of shares called by warrants           516,000 516,000     516,000              
Stock based compensation expense | $             $ 11,771 $ 13,984   $ 39,219 34,843            
Number of equity incentive plans | equityIncentivePlan           3 3     3              
Options outstanding in period (in shares)           18,531,000 18,531,000     18,531,000       22,407,000      
Aggregate intrinsic value of options | $                   $ 74,700 85,300            
Unamortized compensation expense, option | $           $ 24,300 $ 24,300     $ 24,300              
Stock options                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Unamortized compensation expense, weighted average period of recognition                   2 years 7 months 28 days              
Award vesting period                   4 years              
Expiration period from the date of grant                   10 years              
Restricted Stock Units (RSUs)                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Unamortized stock-based compensation expense excluding option | $           50,500 50,500     $ 50,500              
Unamortized compensation expense, weighted average period of recognition                   2 years 9 months 10 days              
Award vesting period                   4 years              
Total fair value of non-option instrument | $                   $ 15,400 7,000            
Performance-Based Restricted Stock Units                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Unamortized stock-based compensation expense excluding option | $           $ 1,000 $ 1,000     $ 1,000              
Unamortized compensation expense, weighted average period of recognition                   1 year 3 months 7 days              
Total fair value of non-option instrument | $                   $ 1,800 $ 400            
Approved by Board of Directors, Outside of Plans                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Options granted in period (in shares)                         4,682,582        
Options exercised (in shares)           2,044,582 2,044,582     2,044,582              
Options outstanding in period (in shares)           2,638,000 2,638,000     2,638,000              
Contract With U.S. News & World Report, L.P.                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Number of shares called by warrants                                 250,000
Exercise price called by warrants (in dollars per share) | $ / shares                                 $ 0.72
Warrant outstanding, term                                 10 years
Warrants exercised in period (in shares)                   125,000 125,000            
Warrants exercised in period , intrinsic value | $                   $ 2,700 $ 4,000            
U.S. News Warrant                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Number of shares called by warrants         516,000                        
Exercise price called by warrants (in dollars per share) | $ / shares         $ 12.56                        
Warrant outstanding, term         10 years                        
Warrants outstanding, vesting period         6 years 5 months 23 days                        
Fair value of warrant | $         $ 34,700                        
Stock based compensation expense | $                   4,000 $ 4,000            
Unamortized stock-based compensation expense excluding option | $           $ 22,800 $ 22,800     $ 22,800              
Unamortized compensation expense, weighted average period of recognition                   4 years 3 months              
U.S. News Warrant | Share-Based Payment Arrangement, Subsequent to Tranche One                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Warrants outstanding, vesting period         6 years                        
U.S. News Warrant | Measurement Input, Share Price                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Warrant, measurement input | $ / shares         76.50                        
U.S. News Warrant | Measurement Input, Price Volatility                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Warrant, measurement input         0.469                        
U.S. News Warrant | Measurement Input, Risk Free Interest Rate                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Warrant, measurement input         0.0161                        
U.S. News Warrant | Measurement Input, Expected Term                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Warrant, measurement input | Year         10                        
U.S. News Warrant | Measurement Input, Expected Dividend Rate                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Warrant, measurement input         0                        
Class A and Class B Common Stock                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Conversion of stock (in shares)       85,523,836                          
Common Class A                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Common stock, authorized (in shares)       1,000,000,000                          
Common stock, par value (in dollars per share) | $ / shares       $ 0.001                          
Common stock, number of votes per share | vote       1                          
Common stock, outstanding (in shares)           121,773,095 121,773,095     121,773,095              
Common Class B                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Common stock, authorized (in shares)       500,000,000                          
Common stock, par value (in dollars per share) | $ / shares       $ 0.001                          
Common stock, number of votes per share | vote       10                          
Conversion of stock, conversion ratio       1                          
Common stock, outstanding (in shares)           64,402,282 64,402,282     64,402,282