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Stock-based Compensation Expense Tables (Tables)
 3 Months Ended
Mar. 27, 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 rate
 
1.41
%
Dividend yield
 
0.9
%
Volatility
 
31.8
%
Expected term (in years)
 
4.8