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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Income Tax Contingency [Line Items]          
Gain on bargain purchase $ 0 $ 74,408 $ 0 $ 74,408  
Income taxes receivable 9,900   9,900   $ 7,900
Unrecognized tax benefits 3,400   3,400   3,400
Accrued liability for interest related to unrecognized tax benefits 400   400   $ 400
Tax Year 2020          
Income Tax Contingency [Line Items]          
Operating loss carryforwards 33,300   33,300    
Income tax refund, CARES Act 11,700   11,700    
NORCAL Group          
Income Tax Contingency [Line Items]          
Gain on bargain purchase       $ 74,400  
Operating loss carryforwards $ 43,000   $ 43,000