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INVESTMENTS (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2024 | Dec. 31, 2023
Schedule of Investments [Line Items] |  |  |  |  |  |
Long-term Investments | $ 8,747 |  | $ 8,747 |  |  | $ 7,247
Estimated Fair Value | 22,189 |  | 22,189 |  |  | 32,915
Cost | 19,971 |  | 19,971 |  |  | 32,717
Cost Method Investments | 4,400 |  | 4,400 |  |  |
Long-term Investments Carried at Fair Value using NAV | 300 |  | 300 |  |  |
Carrying value - private investment |  |  |  |  | $ 4,400 |
Investment carrying value - Vista |  |  |  |  | $ 2,800 |
Carrying value - private investment, Tx Stock Exchange | 1,500 |  | 1,500 |  |  |
Carrying value - private investment funds | 1,000 |  | 1,000 |  |  |
Net change in unrealized appreciation (depreciation) on private investments | 0 | $ 24 | 0 | $ 24 |  |
us-gaap_EquitySecuritiesMember [Member] |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |
Cost | $ 149 |  | $ 149 |  |  | $ 152

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- Definition Carrying value - private investment, Tx Stock Exchange + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Investment carrying value - Vista + References No definition available. + Details
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Namespace Prefix: | whg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Long-term Investments Carried at Fair Value using NAV + References No definition available. + Details
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Namespace Prefix: | whg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |