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Pension Benefits - Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Pension Benefits    
Period of service to become eligible 6 months  
Accumulated benefit obligation $ 3.2 $ 3.7
Subsidiaries    
Pension Benefits    
Pension expense $ 1.1 $ 0.9