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Employee Benefit Plans Summary of Pension Plan and Postretirement Plan Net Periodic Benefit Cost (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Pension Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Interest cost $ 599 $ 561 $ 1,795 $ 1,683
Expected return on plan assets (1,098) (1,011) (3,295) (3,033)
Net amortization and deferral 163 504 490 1,513
Net periodic benefit (336) 54 (1,010) 163
Other Postretirement Benefits Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Interest cost 8 8 25 24
Net accretion and deferral (132) (134) (394) (402)
Net periodic benefit $ (124) $ (126) $ (369) $ (378)