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Retirement Plans - Amounts Expected to be Recognized as Components of Net Periodic Pension Costs (Details)
$ in Thousands
Dec. 31, 2019
USD ($)
Amounts expected to be recognized as component of net periodic pension costs during the next fiscal year:  
Net periodic pension benefit/(cost) $ (315)
Pension plan  
Amounts expected to be recognized as component of net periodic pension costs during the next fiscal year:  
Expected return on plan assets 643
Interest cost (338)
Amortization of net gain/(loss) (68)
Net periodic pension benefit/(cost) 237
SERP  
Amounts expected to be recognized as component of net periodic pension costs during the next fiscal year:  
Interest cost (229)
Amortization of net gain/(loss) $ (86)