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Summary of Charges Incurred by Expense Type and Remaining Liability (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2023
Dec. 31, 2022
Restructuring Cost and Reserve [Line Items]    
Non-cash asset charges   $ (812)
Cash payments $ (4,249)  
Liability 507 2,635
Corporate and Other Operating Expenses    
Restructuring Cost and Reserve [Line Items]    
Charges incurred 2,121 2,635
Acquisition costs and other underwriting expenses    
Restructuring Cost and Reserve [Line Items]    
Charges incurred   812
Employee Severance [Member]    
Restructuring Cost and Reserve [Line Items]    
Non-cash asset charges   0
Cash payments (4,249)  
Liability 507 2,635
Employee Severance [Member] | Corporate and Other Operating Expenses    
Restructuring Cost and Reserve [Line Items]    
Charges incurred 2,121 2,635
Employee Severance [Member] | Acquisition costs and other underwriting expenses    
Restructuring Cost and Reserve [Line Items]    
Charges incurred   0
Lease Right of Use Asset Impairment [Member]    
Restructuring Cost and Reserve [Line Items]    
Non-cash asset charges   (812)
Cash payments 0  
Liability 0 0
Lease Right of Use Asset Impairment [Member] | Corporate and Other Operating Expenses    
Restructuring Cost and Reserve [Line Items]    
Charges incurred $ 0 0
Lease Right of Use Asset Impairment [Member] | Acquisition costs and other underwriting expenses    
Restructuring Cost and Reserve [Line Items]    
Charges incurred   $ 812