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Employee Benefit Plans (Components of Net Periodic Benefit Expense) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Retirement Benefits [Abstract]        
Service cost $ 871 $ 1,049 $ 2,614 $ 3,147
Interest cost on projected benefit obligation 647 551 1,941 1,653
Expected return on plan assets (1,141) (1,306) (3,423) (3,919)
Amortization of unrecognized prior service credit 0 (1) 0 (2)
Amortization of unrecognized net actuarial loss 64 186 194 557
Net periodic benefit expense $ 441 $ 479 $ 1,326 $ 1,436