Annual report [Section 13 and 15(d), not S-K Item 405]

Selected Balance Sheet Data - Narrative (Details)

v3.25.0.1
Selected Balance Sheet Data - Narrative (Details)
$ in Thousands
 12 Months Ended
Jan. 01, 2024
Jan. 01, 2023
Jan. 01, 2022
Jan. 01, 2014
Dec. 31, 2024
USD ($)
installment
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Mar. 31, 2013
USD ($)
Schedule Of Accrued Expenses [Line Items]                
Advances and loans and commissions receivable allowance for credit loss         $ 1,200 $ 700    
SARs frozen liability amount         $ 9,518 11,418    
Treasury note term         1 year      
Interest expense         $ 812 888 $ 708  
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      
Treasury note term       10 years        
Base spread on SARs liability variable rate       2.00%        
SARs liability interest accrual rates 5.95% 5.79% 3.63%          
Interest expense         $ 681 761 $ 542  
Payments for SARs Liability         $ 2,500 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         $ 2,000 $ 500    
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