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Employee Benefit Plans (Details) - USD ($)
3 Months Ended 6 Months Ended
Mar. 25, 2020
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Supplemental Executive Retirement Plan          
Defined Benefit Plan Disclosure          
Accrued liability   $ 800,000   $ 800,000  
Accrued expense   $ 80,000 $ 160,000 $ 80,000 $ 160,000
Pension Benefits          
Defined Benefit Plan Disclosure          
Percentage of employer match       3.00%  
Defined benefit plan contributions by employer percent       6.00%  
Contribution to defined benefit plan $ 500,000,000,000