Annual report pursuant to Section 13 and 15(d)

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

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Fair Value Measurements - Summary of Investments Valued Using NAV Per Share (Detail) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value $ 8,035 $ 5,053
BRIDGE INVESTMENT GROUP HOLDINGS LLC [Member] | Measured at NAV [Member]    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value 39,685 15,672
Unfunded Commitments 23,321 4,860
BRIDGE INVESTMENT GROUP HOLDINGS LLC [Member] | Measured at NAV [Member] | Accrued Performance Allocations [Member]    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value 439,548 199,410
Unfunded Commitments 0 0
BRIDGE INVESTMENT GROUP HOLDINGS LLC [Member] | 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 15,474 12,643
Unfunded Commitments 0 0
BRIDGE INVESTMENT GROUP HOLDINGS LLC [Member] | 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 16,510 332
Unfunded Commitments 20,885 58
BRIDGE INVESTMENT GROUP HOLDINGS LLC [Member] | 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 7,701 2,697
Unfunded Commitments $ 2,436 $ 4,802