Income Taxes - Additional Information (Detail) - BRIDGE INVESTMENT GROUP HOLDINGS LLC [Member] - USD ($) $ in Thousands  | 
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2021  | 
Jun. 30, 2020  | 
Jun. 30, 2021  | 
Jun. 30, 2020  | 
|
| Income Tax Disclosure [Line Items] | ||||
| Effective tax rate | 1.00% | 2.00% | 1.00% | 0.00% | 
| Unrecognized tax positions | $ 0 | $ 0 | ||
| X | ||||||||||
- References No definition available. 
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| X | ||||||||||
- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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| X | ||||||||||
- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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| X | ||||||||||
- Details 
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