Annual report pursuant to Section 13 and 15(d)

Accounting Policies and Recent Accounting Pronouncements - Narrative (Detail)

v3.22.4
Accounting Policies and Recent Accounting Pronouncements - Narrative (Detail)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2022
USD ($)
Dec. 31, 2022
office
Dec. 31, 2022
Dec. 31, 2022
Segment
Dec. 31, 2022
reportingUnit
Dec. 31, 2021
USD ($)
office
Dec. 31, 2020
USD ($)
office
Accounting Policies [Line Items]                
Guarantee obligations       16.70%        
Property and equipment, amortization method straight-line              
Advertising costs | $   $ 1,653         $ 830 $ 586
Income tax benefit realized, percentage       50.00%        
Payment of dividends | $   $ 60,358         $ 0 $ 0
Commission's receivable settled period 10 days              
Number of offices | office     81          
Number of reporting units         1 1    
Finite-lived intangible asset, amortization method straight-line              
ESPP                
Accounting Policies [Line Items]                
Length of purchase intervals 6 months              
Customer Concentration Risk | Total revenues | Customer                
Accounting Policies [Line Items]                
Concentration risk percentage       10.00%     10.00% 10.00%
Customer Concentration Risk | Commissions receivable | Customer                
Accounting Policies [Line Items]                
Concentration risk percentage       10.00%     10.00% 10.00%
Geographic Concentration Risk | Total revenues                
Accounting Policies [Line Items]                
Number of offices | office     0       0 0
Geographic Concentration Risk | Total revenues | Customer                
Accounting Policies [Line Items]                
Concentration risk percentage       10.00%     10.00% 10.00%
Transaction Risk | Total revenues | Customer                
Accounting Policies [Line Items]                
Concentration risk percentage       0.00%     0.00% 0.00%
Minimum                
Accounting Policies [Line Items]                
Property and equipment, estimated useful lives 3 years              
Advances to investment sales and financing professionals, repayment term 5 years              
Deferred term for payment of additional commissions 1 year              
Finite-lived intangible asset, useful life 1 year              
Minimum | Loan To Investment Sales and Financing Professionals                
Accounting Policies [Line Items]                
Loans to investment sales and financing professionals, repayment term 1 year              
Maximum                
Accounting Policies [Line Items]                
Property and equipment, estimated useful lives 7 years              
Advances to investment sales and financing professionals, repayment term 10 years              
Deferred term for payment of additional commissions 3 years              
Finite-lived intangible asset, useful life 7 years              
Maximum | Loan To Investment Sales and Financing Professionals                
Accounting Policies [Line Items]                
Loans to investment sales and financing professionals, repayment term 7 years              
Maximum | Geographic Concentration Risk | CANADA | Total revenues | Customer                
Accounting Policies [Line Items]                
Concentration risk percentage       2.00%     2.00% 1.00%
Capitalization of Internal Labor                
Accounting Policies [Line Items]                
Property and equipment, estimated useful lives 5 years