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Future Amortization of Finite Lived Intangibles (Details 2) - USD ($)
$ in Thousands
Dec. 27, 2020
Dec. 29, 2019
Estimated aggregate future amortization expense    
2021 $ 2,903  
2022 2,490  
2023 2,349  
2024 2,098  
2025 1,758  
Thereafter 5,656  
Net Carrying Amount $ 17,254 $ 22,515