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Benefit Plans - Narrative (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Apr. 30, 2023
Mar. 31, 2023
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Defined Contribution Plan Disclosure [Line Items]          
Incurred expense related to savings and retirement plans     $ 5,900 $ 5,700 $ 4,300
ProAssurance deferred compensation liabilities total     $ 33,793 $ 32,043  
Defined benefit pension plan for annual compensation     5 years    
Maximum          
Defined Contribution Plan Disclosure [Line Items]          
Percentage of benefit plan contribution by employer (percent) 6.00% 5.00%   5.00% 5.00%
Minimum          
Defined Contribution Plan Disclosure [Line Items]          
Percentage of benefit plan contribution by employer (percent) 5.00%