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Employee Benefit Plans (Components of Net Periodic Benefit Expense) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Retirement Benefits [Abstract]    
Service cost $ 872 $ 1,049
Interest cost on projected benefit obligation 647 551
Expected return on plan assets (1,141) (1,306)
Amortization of unrecognized prior service credit 0 (1)
Amortization of unrecognized net actuarial loss 65 186
Net periodic benefit expense $ 443 $ 479