Quarterly report [Sections 13 or 15(d)]

Selected Balance Sheet Data - Narrative (Details)

v3.25.3
Selected Balance Sheet Data - Narrative (Details)
$ in Thousands
 3 Months Ended 9 Months Ended
Jan. 01, 2025
Jan. 01, 2024
Jan. 01, 2014
Sep. 30, 2025
USD ($)
installment
Sep. 30, 2024
USD ($)
Sep. 30, 2025
USD ($)
installment
Sep. 30, 2024
USD ($)
Dec. 31, 2024
USD ($)
Mar. 31, 2013
USD ($)
Schedule Of Accrued Expenses [Line Items]                  
Advances and loans and commissions receivable allowance for credit loss       $ 1,000   $ 1,000   $ 1,200  
SARs frozen liability amount       $ 7,187   $ 7,187   $ 9,518  
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
Number of annual installments | installment       10   10      
Treasury note term     10 years            
Base spread on SARs liability variable rate     2.00%            
SARs liability interest accrual rates 6.57% 5.95%              
Interest expense       $ 156 $ 170 $ 469 $ 510    
Payments for SARs Liability           $ 2,600 2,500    
Deferred Compensation Liability                  
Schedule Of Accrued Expenses [Line Items]                  
Fair value of deferred compensation plan assets           110.00%      
Payments made during the period           $ 260 $ 172    
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