Bridge Investment Group Holdings Inc. Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Summary of Carrying Amounts and Estimated Fair Values of Financial Instruments at Amortized Cost (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Notes Payable, Net (private notes)	$ 12,007	$ 16,458
BRIDGE INVESTMENT GROUP HOLDINGS LLC [Member] \| Fair Value [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Notes Payable, Net (private notes)	146,211	149,225
BRIDGE INVESTMENT GROUP HOLDINGS LLC [Member] \| Carrying Value [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Notes Payable, Net (private notes)	150,000	150,000
BRIDGE INVESTMENT GROUP HOLDINGS LLC [Member] \| Level 1 [Member] \| Fair Value [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Notes Payable, Net (private notes)
BRIDGE INVESTMENT GROUP HOLDINGS LLC [Member] \| Level 2 [Member] \| Fair Value [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Notes Payable, Net (private notes)
BRIDGE INVESTMENT GROUP HOLDINGS LLC [Member] \| Level 3 [Member] \| Fair Value [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Notes Payable, Net (private notes)	$ 146,211	$ 149,225