XML 108 R84.htm IDEA: XBRL DOCUMENT v3.26.1
Fair Value Measurement - Recurring and Non-recurring Basis (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Fair Value Measurement      
Impairment charges for equity investments without readily determinable fair values $ 6,000 $ 38,700  
Impairment charge of goodwill recognized 0 0 $ 0
Recurring      
Fair Value Measurement      
Fair value change gain for equity securities with readily determinable fair values 21,300 18,600 32,100
Non-recurring      
Fair Value Measurement      
Impairment charge of goodwill recognized 0 0 0
Significant Other Observable Inputs (Level 2) | Non-recurring | Unsecured senior notes      
Fair Value Measurement      
Fair value debt amount 712,500 671,300  
Significant Other Observable Inputs (Level 2) | Non-recurring | Convertible notes      
Fair Value Measurement      
Fair value debt amount $ 383,000 362,800  
Significant Unobservable Inputs (Level 3)      
Fair Value Measurement      
Valuation technique us-gaap:ValuationTechniqueDiscountedCashFlowMember    
Measurement input wb:MeasurementInputDiscountCurveOfMarketInterestRatesMember    
Significant Unobservable Inputs (Level 3) | Non-recurring      
Fair Value Measurement      
Impairment charges for equity investments without readily determinable fair values $ 6,000 38,700 $ 25,700
Carrying value of impaired investments $ 96,900 $ 22,200  
Investment, Type [Extensible Enumeration] wb:CertainInvestmentsUnderCostMethodAndEquityMethodUsingUnobservableInputsMember wb:CertainInvestmentsUnderCostMethodAndEquityMethodUsingUnobservableInputsMember wb:CertainInvestmentsUnderCostMethodAndEquityMethodUsingUnobservableInputsMember
Impairment charges were recorded for equity method investment $ 19,700 $ 6,600 $ 0