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Goodwill (Carrying Value of Goodwill by Segment) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | $ 250,966 | $ 249,922
Accumulated impairment losses, Beginning Balance | (202,532) | (202,532)
Goodwill, Net, Beginning Balance | 48,434 | 47,390
Foreign currency translation adjustment | 377 | 1,044
Goodwill, Ending balance | 251,343 | 250,966
Accumulated impairment losses, Ending balance | (202,532) | (202,532)
Goodwill, Net, Ending balance | 48,811 | 48,434
Operating Segments [Member] | Sohu [Member] |  |
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | 70,423 | 69,379
Accumulated impairment losses, Beginning Balance | (32,246) | (32,246)
Goodwill, Net, Beginning Balance | 38,177 | 37,133
Foreign currency translation adjustment | 377 | 1,044
Goodwill, Ending balance | 70,800 | 70,423
Accumulated impairment losses, Ending balance | (32,246) | (32,246)
Goodwill, Net, Ending balance | 38,554 | 38,177
Operating Segments [Member] | Changyou [Member] |  |
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | 180,543 | 180,543
Accumulated impairment losses, Beginning Balance | (170,286) | (170,286)
Goodwill, Net, Beginning Balance | 10,257 | 10,257
Foreign currency translation adjustment | 0 | 0
Goodwill, Ending balance | 180,543 | 180,543
Accumulated impairment losses, Ending balance | (170,286) | (170,286)
Goodwill, Net, Ending balance | $ 10,257 | $ 10,257

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