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Employee Benefit and Deferred Compensation Plans - Amounts to be Amortized from AOCI (Details)
$ in Thousands
Dec. 31, 2019
USD ($)
Pension Benefits  
Estimated costs that will be amortized from accumulated other comprehensive income into net periodic cost  
Prior service cost $ 0
Actuarial loss (gain) 318
Total 318
Other Benefits  
Estimated costs that will be amortized from accumulated other comprehensive income into net periodic cost  
Prior service cost 0
Actuarial loss (gain) (67)
Total $ (67)