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Concentration Risks (Details) | 12 Months Ended
--- | ---
Dec. 31, 2021 USD ($) Institutions | Dec. 31, 2020 USD ($) Institutions | Dec. 31, 2019 USD ($)
Concentration Risk [Line Items] |  |  |
Revenues | $ 835,576,000 | $ 749,890,000 | $ 673,803,000
TLBB PC [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Revenues | 421,700,000 |  |
Legacy TLBB Mobile [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Revenues | $ 79,500,000 |  |
Customer Risk [Member] | Total revenues [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Description of concentration risk for operation risk | For the years ended December 31, 2021, 2020 and 2019, there were no revenues from customers that individually represent greater than 10% of the total online advertising revenues. | For the years ended December 31, 2021, 2020 and 2019, there were no revenues from customers that individually represent greater than 10% of the total online advertising revenues. | For the years ended December 31, 2021, 2020 and 2019, there were no revenues from customers that individually represent greater than 10% of the total online advertising revenues.
Revenues from customers that individually represent greater than 10% of total advertising revenues | $ 0 | $ 0 | $ 0
Product Risk [Member] | Total revenues [Member] | TLBB PC [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of concentration risk | 50.00% |  |
Product Risk [Member] | Total revenues [Member] | Legacy TLBB Mobile [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of concentration risk | 10.00% |  |
Product Risk [Member] | Total revenues [Member] | Changyou [Member] | TLBB PC [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of concentration risk | 65.00% |  |
Product Risk [Member] | Total revenues [Member] | Changyou [Member] | Legacy TLBB Mobile [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of concentration risk | 12.00% |  |
Product Risk [Member] | Online game revenues [Member] | Changyou [Member] | TLBB PC [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of concentration risk | 66.00% |  |
Product Risk [Member] | Online game revenues [Member] | Changyou [Member] | Legacy TLBB Mobile [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of concentration risk | 12.00% |  |
Credit Risk [Member] | Cash and Cash Equivalents, Short Term Investments, and Long Term Time Deposits [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Maximum percentage of Sohu's cash and bank deposits in any single financial institution | 35.00% |  |
Credit Risk [Member] | Cash and Cash Equivalents, Short Term Investments, and Long Term Time Deposits [Member] | CHINA |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of concentration risk | 61.00% |  |
Number of financial institutions cash and cash equivalents and short-term investment concentrated held in | Institutions | 16 |  |
Credit Risk [Member] | Cash and cash equivalents and short-term investments [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Maximum percentage of Sohu's cash and bank deposits in any single financial institution |  | 59.00% |
Credit Risk [Member] | Cash and cash equivalents and short-term investments [Member] | CHINA |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of concentration risk |  | 95.00% |
Number of financial institutions cash and cash equivalents and short-term investment concentrated held in | Institutions |  | 22 |

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