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Operating (Gains), Losses and Other Charges, Net - Operating Gain and Restructuring Charges (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 24, 2020
Jun. 30, 2021
Jun. 24, 2020
Other Income and Expenses [Abstract]        
(Gains) losses on sales of assets and other, net $ (65) $ 12 $ (1,007) $ (1,058)
Restructuring charges and exit costs (48) 1,615 1,426 1,977
Impairment charges 0 0 0 2,181
Operating (gains), losses and other charges, net (113) 1,627 419 3,100
Restructuring Charges [Abstract]        
Exit costs 141 50 223 94
Severance and other restructuring charges (189) 1,565 1,203 1,883
Total restructuring charges and exit costs $ (48) $ 1,615 $ 1,426 $ 1,977