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Employee Benefit Plans Amounts Recognized on Balance Sheet Table (Details) - Pension Plans, Defined Benefit [Member] - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]    
Assets for Plan Benefits, Defined Benefit Plan $ 1,690 $ 1,350
Defined Benefit Plan, Amounts Recognized in Balance Sheet    
Current liabilities (330) (340)
Noncurrent liabilities (7,680) (6,660)
Net liability recognized at December 31 $ (6,320) $ (5,650)