XML 77 R53.htm IDEA: XBRL DOCUMENT v3.26.1

Long-term Investments - Carrying Value of Equity Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Total carrying value of the equity securities
Initial cost basis	$ 824,316	$ 824,481
Upward adjustments	92,736	92,736
Downward adjustments	(624,380)	(618,408)
Foreign currency translation	(980)	(2,834)
Total carrying value at the end of the period	$ 291,692	$ 295,975

X

- References

No definition available.

+ Details

Name:	us-gaap_EquitySecuritiesFvNiAndWithoutReadilyDeterminableFairValueAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of investment in equity security without readily determinable fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 321
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479536/321-10-50-3

+ Details

Name:	us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of cumulative loss from downward price adjustment on investment in equity security without readily determinable fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 321
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479536/321-10-50-3

+ Details

Name:	us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueDownwardPriceAdjustmentCumulativeAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of cumulative gain from upward price adjustment on investment in equity security without readily determinable fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 321
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479536/321-10-50-3

+ Details

Name:	us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentCumulativeAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of foreign currency translation on investment in equity security without readily determinable fair value.

+ References

No definition available.

+ Details

Name:	wb_EquitySecuritiesWithoutReadilyDeterminableFairValueForeignCurrencyTranslation
Namespace Prefix:	wb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Initial cost of investment in equity security without readily determinable fair value.

+ References

No definition available.

+ Details

Name:	wb_EquitySecuritiesWithoutReadilyDeterminableFairValueInitialCostBasis
Namespace Prefix:	wb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant