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Retirement Plans - Amounts Expected to be Recognized as Components of Net Periodic Pension Costs (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
Amounts expected to be recognized as component of net periodic pension costs during the next fiscal year:  
Net periodic pension benefit/(cost) $ (366)
Pension plan  
Amounts expected to be recognized as component of net periodic pension costs during the next fiscal year:  
Expected return on plan assets 522
Interest cost (389)
Amortization of net gain/(loss) (75)
Net periodic pension benefit/(cost) 58
SERP  
Amounts expected to be recognized as component of net periodic pension costs during the next fiscal year:  
Interest cost (304)
Amortization of net gain/(loss) $ (62)