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Pension Accumulated Benefit Obligation in Excess of Plan Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Defined Contribution Plan [Abstract]    
Projected Benefit Obligation $ 40,196 $ 33,569
Accumulated Benefit Obligation 40,196 33,169
Fair Value of Plan Assets $ 0 $ 0