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Summary of Significant Accounting Policies (Revenue Recognition, Adoption of ASC 606, Revenues Disaggregated by Products and Services) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues | $ 835,576 | $ 749,890 | $ 673,803
ASC 606 [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues | 835,576 | 749,890 | 673,803
Sohu [Member] | ASC 606 [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues | 186,606 | 201,544 | 218,423
Changyou [Member] | ASC 606 [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues | 648,970 | 548,346 | 455,380
Brand advertising [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues | 134,967 | 146,526 | 175,056
Sohu Media Portal [Member] | ASC 606 [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues | 75,408 | 86,293 | 94,692
Sohu Media Portal [Member] | Sohu [Member] | ASC 606 [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues | 75,408 | 86,293 | 94,692
Sohu Media Portal [Member] | Changyou [Member] | ASC 606 [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues | 0 | 0 | 0
Sohu Video [Member] | ASC 606 [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues | 26,803 | 25,312 | 34,529
Sohu Video [Member] | Sohu [Member] | ASC 606 [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues | 26,803 | 25,312 | 34,529
Sohu Video [Member] | Changyou [Member] | ASC 606 [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues | 0 | 0 | 0
Focus [Member] | ASC 606 [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues | 22,013 | 23,281 | 32,120
Focus [Member] | Sohu [Member] | ASC 606 [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues | 22,013 | 23,281 | 32,120
Focus [Member] | Changyou [Member] | ASC 606 [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues | 0 | 0 | 0
17173.com Website [Member] | ASC 606 [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues | 10,743 | 11,640 | 13,715
17173.com Website [Member] | Sohu [Member] | ASC 606 [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues | 0 | 0 | 0
17173.com Website [Member] | Changyou [Member] | ASC 606 [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues | 10,743 | 11,640 | 13,715
Online games [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues | 638,225 | 536,684 | 440,902
PC games [Member] | ASC 606 [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues | 469,332 | 353,737 | 267,752
PC games [Member] | Sohu [Member] | ASC 606 [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues | 0 | 0 | 0
PC games [Member] | Changyou [Member] | ASC 606 [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues | 469,332 | 353,737 | 267,752
Mobile games [Member] | ASC 606 [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues | 168,893 | 182,947 | 172,718
Mobile games [Member] | Sohu [Member] | ASC 606 [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues | 0 | 0 | 0
Mobile games [Member] | Changyou [Member] | ASC 606 [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues | 168,893 | 182,947 | 172,718
Other games [Member] | ASC 606 [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues |  |  | 432
Other games [Member] | Sohu [Member] | ASC 606 [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues |  |  | 0
Other games [Member] | Changyou [Member] | ASC 606 [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues |  |  | 432
Others [Member] | ASC 606 [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues | 62,384 | 66,680 | 57,845
Others [Member] | Sohu [Member] | ASC 606 [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues | 62,382 | 66,658 | 57,082
Others [Member] | Changyou [Member] | ASC 606 [Member] |  |  |
Revenues Disaggregated by Products and Services [Line Items] |  |  |
Revenues | $ 2 | $ 22 | $ 763

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