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Pension Plans (Components of Pension Cost) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 0 $ 0 $ 0 $ 0
Interest cost 295 295 884 885
Expected return on plan assets (288) (288) (864) (864)
Amortization of net loss (gain) 44 44 132 132
Net periodic pension cost 51 51 152 153
Pension Plan        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 0 0 0 0
Interest cost 267 267 800 801
Expected return on plan assets (288) (288) (864) (864)
Amortization of net loss (gain) 180 180 540 540
Net periodic pension cost 159 159 476 477
SERP        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 0 0 0 0
Interest cost 28 28 84 84
Expected return on plan assets 0 0 0 0
Amortization of net loss (gain) (136) (136) (408) (408)
Net periodic pension cost $ (108) $ (108) $ (324) $ (324)