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Employee Retirement Plans (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Employee Retirement Plans        
Service cost $ 30 $ 113 $ 147 $ 306
Interest cost 589 639 1,858 1,913
Expected return on plan assets (642) (607) (1,898) (1,831)
Net amortization and deferral 1 107 111 305
Pension expense $ (22) $ 252 $ 218 $ 693