Quarterly report pursuant to Section 13 or 15(d)

Self-Insurance Reserves - Additional Information (Detail)

v3.21.2
Self-Insurance Reserves - Additional Information (Detail) - USD ($)
Jun. 20, 2020
Sep. 30, 2021
Dec. 31, 2020
Deferred Policy Acquisition Cost [Line Items]      
Self insurance policy coverage limit   $ 2,000,000.0  
BRIDGE INVESTMENT GROUP HOLDINGS LLC [Member]      
Deferred Policy Acquisition Cost [Line Items]      
Self insurance stop-loss coverage amount per individual per year   125,000  
Property and casualty claims for insured, per property   25,000  
Self insurance policy coverage limit   5,000,000.0  
Self Insurance reserve, limits per unit   $ 750,000  
Percentage of catastrophic losses in non-CAT Zones   5.00%  
Insurance loss reserves   $ 5,418,000 $ 4,436,000
Self-insurance reserves and unearned premiums   4,300,000 3,700,000
Self insurance liability retention per location threshold $ 4,000,000.0    
BRIDGE INVESTMENT GROUP HOLDINGS LLC [Member] | Multifamily Properties [Member]      
Deferred Policy Acquisition Cost [Line Items]      
Selling limit of losses on claim in insurance policy   100,000  
BRIDGE INVESTMENT GROUP HOLDINGS LLC [Member] | Commercial Office Properties [Member]      
Deferred Policy Acquisition Cost [Line Items]      
Selling limit of losses on claim in insurance policy   $ 50,000  
Property Insurance [Member] | BRIDGE INVESTMENT GROUP HOLDINGS LLC [Member]      
Deferred Policy Acquisition Cost [Line Items]      
Self insurance policy coverage limit, percentage of claim   100.00%  
Self insurance policy coverage limit, amount claimable   $ 2,000,000.0  
General Liability [Member] | BRIDGE INVESTMENT GROUP HOLDINGS LLC [Member]      
Deferred Policy Acquisition Cost [Line Items]      
Self Insurance reserve, Annual policy amount 10,000,000.0    
Self Insurance reserve, Excess amount $ 2,000,000.0    
Insurance loss reserves   900,000 400,000
Minimum [Member] | BRIDGE INVESTMENT GROUP HOLDINGS LLC [Member]      
Deferred Policy Acquisition Cost [Line Items]      
Property and casualty claims for insured, per property   25,000  
Catastrophic losses in non-CAT Zones   25,000  
Maximum [Member] | BRIDGE INVESTMENT GROUP HOLDINGS LLC [Member]      
Deferred Policy Acquisition Cost [Line Items]      
Property and casualty claims for insured, per property   100,000  
Catastrophic losses in non-CAT Zones   50,000  
Bride Property Management [Member] | BRIDGE INVESTMENT GROUP HOLDINGS LLC [Member]      
Deferred Policy Acquisition Cost [Line Items]      
Property and casualty claims for insured, per property   25,000  
Bride Property Management [Member] | BRIDGE INVESTMENT GROUP HOLDINGS LLC [Member] | Multifamily Properties [Member]      
Deferred Policy Acquisition Cost [Line Items]      
Property and casualty claims for insured, per property   25,000  
Bride Property Management [Member] | BRIDGE INVESTMENT GROUP HOLDINGS LLC [Member] | Commercial Office Properties [Member]      
Deferred Policy Acquisition Cost [Line Items]      
Property and casualty claims for insured, per property   50,000  
Self Insured Retention [Member] | BRIDGE INVESTMENT GROUP HOLDINGS LLC [Member] | Multifamily Properties [Member]      
Deferred Policy Acquisition Cost [Line Items]      
Catastrophic losses in non-CAT Zones   75,000  
Medical SelfInsurance Reserves [Member]      
Deferred Policy Acquisition Cost [Line Items]      
Medical self-insurance reserves   $ 3,400,000 $ 3,300,000