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Benefit Plan Schedule of balances of AOCI (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Defined Benefit Plan [Abstract] |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), after Tax | $ 168 | $ 0
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax | 33,933 | 37,560
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax | (33,765) | (37,560)
Deferred Tax Assets, Tax Deferred Expense, Other | 7,091 | 7,888
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax | $ (26,674) | $ (29,672)

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