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

Selected Balance Sheet Data - Narrative (Details)

v3.25.4
Selected Balance Sheet Data - Narrative (Details)
$ in Thousands
 12 Months Ended
Jan. 01, 2025
Jan. 01, 2024
Jan. 01, 2023
Jan. 01, 2014
Dec. 31, 2025
USD ($)
installment
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Mar. 31, 2013
USD ($)
Schedule Of Accrued Expenses [Line Items]                
Advances and loans and commissions receivable allowance for credit loss         $ 1,100 $ 1,200    
SARs frozen liability amount         7,343 9,518    
Interest expense         $ 773 812 $ 888  
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 6.57% 5.95% 5.79%          
Interest expense         $ 625 681 $ 761  
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         $ 300 $ 2,000    
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