Intangible Assets - Additional Information (Detail) - BRIDGE INVESTMENT GROUP HOLDINGS LLC [Member] - USD ($) $ in Millions  | 
3 Months Ended | 6 Months Ended | ||
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Jun. 30, 2021  | 
Jun. 30, 2020  | 
Jun. 30, 2021  | 
Jun. 30, 2020  | 
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| Finite-Lived Intangible Assets [Line Items] | ||||
| Amortization of Intangible Assets | $ 0.4 | $ 0.4 | $ 0.8 | $ 0.8 | 
| Minimum [Member] | ||||
| Finite-Lived Intangible Assets [Line Items] | ||||
| Amortization period | 6 years | |||
| Maximum [Member] | ||||
| Finite-Lived Intangible Assets [Line Items] | ||||
| Amortization period | 10 years | |||
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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- Definition Remaining amortization period of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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