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Commitments And Contingencies (Narrative) (Details) - USD ($)
6 Months Ended
Jul. 13, 2021
Jun. 18, 2021
Oct. 01, 2020
Jun. 30, 2021
Jun. 30, 2020
Commitments And Contingencies [Line Items]          
(Increase) decrease in prepaid and other assets       $ 2,017,000 $ 5,773,000
General Diversified Limited Litigation [Member]          
Commitments And Contingencies [Line Items]          
Damages sought   $ 0      
Estimated Litigation Liability       $ 0  
Cotter, Jr., Derivative Litigation [Member]          
Commitments And Contingencies [Line Items]          
Damages sought     $ 809,000    
California Employment Litigation [Member]          
Commitments And Contingencies [Line Items]          
Settlement awarded $ 4,000,000.0