Quarterly report pursuant to Section 13 or 15(d)

Selected Balance Sheet Data - Narrative (Detail)

v3.23.1
Selected Balance Sheet Data - Narrative (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Jan. 01, 2022
Jan. 01, 2021
Jan. 01, 2014
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Mar. 31, 2013
Schedule Of Accrued Expenses [Line Items]              
Advances and loans and commissions receivable allowance for credit loss       $ 848   $ 791  
SARs frozen liability amount       $ 10,847   $ 13,137  
Treasury note term       1 year      
Interest expense       $ 215 $ 160    
Commissions Payable              
Schedule Of Accrued Expenses [Line Items]              
Maximum payment deferral period for certain commissions payable       3 years      
SARs              
Schedule Of Accrued Expenses [Line Items]              
SARs frozen liability amount             $ 20,000
Treasury note term     10 years        
Base spread on SARs liability variable rate     2.00%        
SARs liability interest accrual rates 3.63% 5.79%          
Interest expense       $ 190 135    
Payments for SARs Liability       $ 2,200 2,300    
Deferred Compensation Liability              
Schedule Of Accrued Expenses [Line Items]              
Fair value of deferred compensation plan assets       110.00%      
Payments made during the period       $ 48 $ 365    
Deferred Compensation Liability | Minimum              
Schedule Of Accrued Expenses [Line Items]              
Payout period       2 years      
Deferred Compensation Liability | Maximum              
Schedule Of Accrued Expenses [Line Items]              
Payout period       15 years