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Sohu.com Limited Shareholders' Equity (Sohu's 2018 Share Incentive Plan, Share Option Activity, Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Sep. 30, 2021
Sep. 30, 2020
Jul. 31, 2019
Feb. 28, 2019
Nov. 30, 2017
Sep. 30, 2017
May 31, 2016
Feb. 28, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Share-based compensation expense $ 8,578 $ 14,480 $ 2,350                
Sohu.com Limited [Member] | Sohu 2010 Stock Incentive Plan [Member] | Stock Options [Member] | Common Stock [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Number of shares under contractually granted share options               6,000 32,000 13,000 1,068,000
Exercise prices of option granted               $ 0.001 $ 0.001 $ 0.001 $ 0.001
Sohu.com Limited [Member] | Sohu 2018 Share Incentive Plan [Member] | Stock Options [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Installments of share options granted four equal installments                    
Award vesting period 4 years                    
Number of options granted in period 113,000                    
Total fair value of stock options granted $ 28,500                    
Share-based compensation expense 1,800 2,600 (1,900)                
Total fair values of share options vested 2,100 1,000 2,500                
Total intrinsic value of share options exercised $ 800 $ 700 $ 600                
Sohu.com Limited [Member] | Sohu 2018 Share Incentive Plan [Member] | Stock Options [Member] | Common Stock [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Number of shares under contractually granted share options       5,000 34,000 477,500 20,000        
Exercise prices of option granted       $ 0.001 $ 0.001 $ 0.001 $ 0.001        
Number of options granted in period 927,788