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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, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Retirement Benefits [Abstract]        
Service cost $ 447 $ 871 $ 1,342 $ 2,614
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] Labor and Related Expense Labor and Related Expense Labor and Related Expense Labor and Related Expense
Interest cost on projected benefit obligation $ 855 $ 647 $ 2,565 $ 1,941
Expected return on plan assets (878) (1,141) (2,634) (3,423)
Amortization of unrecognized prior service credit (123) 0 (368) 0
Amortization of unrecognized net actuarial loss 316 64 948 194
Net periodic benefit expense $ 617 $ 441 $ 1,853 $ 1,326