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Credit Losses (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Jan. 01, 2020
Credit Loss Allowance Activity [Line Items]        
Premium Receivable, Allowance for Credit Loss $ 51 $ 32   $ 16
Charged to Costs and Expenses (113) (56)    
Premium Receivable, Allowance for Credit Loss, Writeoff 132 72    
Reinsurance Recoverable, Allowance for Credit Loss 97 333 $ 58  
Reinsurance Recoverable, Credit Loss Expense (Reversal) (236) 275    
Reinsurance recoverable, allowance for credit loss, writeoff 0 0    
Financing Receivable, Allowance for Credit Loss 0 0    
Total Credit Loss Allowances 148 365 $ 74  
Change in Credit Loss Allowance (349) 219    
Total Credit Loss Allowance Writeoffs $ 132 $ 72