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Significant Accounting Policies - Narrative (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Jan. 01, 2020
Accounting Policies [Abstract]          
Finite-Lived Intangible Asset, Useful Life   7 years      
Financing Receivable, Allowance for Credit Loss [Line Items]          
Premium Receivable, Allowance for Credit Loss   $ 32 $ 140   $ 165
Reinsurance Recoverable, Allowance for Credit Loss   563 386 $ 256  
Financing Receivable, Allowance for Credit Loss   0 20 141  
Total Credit Loss Allowances   595 546 562  
Charged to Costs and Expenses   (190) (311)    
Reinsurance Recoverable, Credit Loss Expense (Reversal)   177 130    
Financing Receivable, Allowance for Credit Loss, Writeoff   0 0    
Financing Receivable, Credit Loss, Expense (Reversal)   (20) (121)    
Total Credit Loss Allowance Writeoffs   82 286    
Change in Credit Loss Allowance   (33) (302)    
Premium Receivable, Allowance for Credit Loss, Writeoff   82 286    
Reinsurance recoverable, allowance for credit loss, writeoff   0 0    
Cash, Uninsured Amount   254,989 320,514    
Marketing and Advertising Expense   $ 910 1,212 $ 1,426  
Tax Cuts and Jobs Act, Income Tax Expense (Benefit) $ 5,263        
Tax Cuts and Jobs Act, Change in Tax Rate, Income Tax Expense (Benefit)     $ 12,566