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Stock-based Compensation Expense Tables (Tables)
 6 Months Ended
Jun. 26, 2020
Share-based Payment Arrangement [Abstract]  
Schedule Of Share Based Payment Award SARs Valuation Assumptions [Table Text Block] The Company estimated the fair value of the SARs using the following weighted-average assumptions in the Black-Scholes model:
Risk-free interest rate1.41 %
Dividend yield0.9 %
Volatility31.8 %
Expected term (in years)4.8