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Income Taxes - Additional Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Income Tax Contingency [Line Items]      
Net tax (benefit)/charge recorded directly to consolidated shareholders' equity $ (26,800) $ 16,200 $ 7,100
Valuation allowance 3,203 3,597  
Base year reserves included in retained earnings 18,200    
Unrecognized deferred federal income tax liability 4,800    
Amount related to unrecognized tax benefits that if reversed would impact effective tax rate 4,000 5,400  
Interest and penalties expense/(benefit) related to the liability for unrecognized tax benefits     $ 500
Balance of accrual for interest and penalties 1,500 1,500  
Maximum      
Income Tax Contingency [Line Items]      
Interest and penalties expense/(benefit) related to the liability for unrecognized tax benefits $ (100) $ 100