Quarterly report pursuant to Section 13 or 15(d)

Investment Income (Loss) - Summary of Investment Income (Loss) (Detail)

v3.21.2
Investment Income (Loss) - Summary of Investment Income (Loss) (Detail) - BRIDGE INVESTMENT GROUP HOLDINGS LLC [Member] - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Schedule Of Realized And Unrealized Gains Losses [Line Items]        
Net realized gains (losses) $ (95,000) $ 68,000 $ (411,000) $ (121,000)
Net unrealized gains (losses) 2,660,000 211,000 9,074,000 784,000
Total investment income (loss) 2,565,000 143,000 8,663,000 663,000
Investment In CompanySponsored Funds [Member]        
Schedule Of Realized And Unrealized Gains Losses [Line Items]        
Net realized gains (losses) (1,000) 34,000 (5,000) (35,000)
Net unrealized gains (losses) (1,269,000) 27,000 3,184,000 (26,000)
Total investment income (loss) (1,270,000) 61,000 3,179,000 (61,000)
Investment In Third Party Partnerships [Member]        
Schedule Of Realized And Unrealized Gains Losses [Line Items]        
Net realized gains (losses) (98,000) 38,000 410,000 2,000
Net unrealized gains (losses) 683,000 12,000 2,206,000 154,000
Total investment income (loss) 585,000 26,000 1,796,000 156,000
Others Investments [Member]        
Schedule Of Realized And Unrealized Gains Losses [Line Items]        
Net realized gains (losses) 4,000 64,000 4,000 (88,000)
Net unrealized gains (losses) 2,832,000 1,000 2,854,000 (1,000)
Total investment income (loss) 2,836,000 63,000 2,858,000 (89,000)
General Partner Notes Payable [Member]        
Schedule Of Realized And Unrealized Gains Losses [Line Items]        
Net realized gains (losses) 0 0 0 0
Net unrealized gains (losses) 414,000 171,000 830,000 657,000
Total investment income (loss) $ 414,000 $ 171,000 $ 830,000 $ 657,000