Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Summary of Investments Valued Using NAV Per Share (Detail)

v3.21.2
Fair Value Measurements - Summary of Investments Valued Using NAV Per Share (Detail) - BRIDGE INVESTMENT GROUP HOLDINGS LLC [Member] - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value $ 5,133 $ 5,053
Measured at NAV [Member]    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value 281,330 215,082
Unfunded Commitments 3,687 4,860
Measured at NAV [Member] | Carried Interest [Member]    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value 246,620 199,410
Unfunded Commitments 0 0
Measured at NAV [Member] | Company Sponsored Open-end Fund [Member]    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value 13,861 12,643
Unfunded Commitments 0 0
Measured at NAV [Member] | Company Sponsored Closed-end Funds [Member]    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value 15,768 332
Unfunded Commitments 58 58
Measured at NAV [Member] | Third Party Closed-end Funds [Member]    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value 5,081 2,697
Unfunded Commitments $ 3,629 $ 4,802