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Stock Based Compensation (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 29, 2018
USD ($)
Plan
$ / shares
shares
Sep. 30, 2017
USD ($)
shares
Sep. 29, 2018
USD ($)
Plan
$ / shares
shares
Sep. 30, 2017
USD ($)
$ / shares
shares
Dec. 30, 2017
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Abstract]          
Number of plans that have shares reserved for further issuance | Plan 1   1    
Minimum [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Abstract]          
Percentage of fair market value of stock on grant date for exercise price     100.00%    
Stock Appreciation Rights (SARs) [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Abstract]          
Stock-based compensation expense | $ $ 74,000 $ 47,000 $ 203,000 $ 117,000  
Number of Units, Stock Appreciation Rights (SARs) [Roll Forward]          
Outstanding at beginning of period (in shares) | shares     141,500 0 0
Issued (in shares) | shares 0   51,000   149,500
Forfeited (in shares) | shares     (2,000)   (8,000)
Outstanding at end of period (in shares) | shares 190,500   190,500   141,500
Weighted - Average Exercise Price, Stock Appreciation Rights (SARs) [Abstract]          
Outstanding at beginning of period (in dollars per share) | $ / shares     $ 20.36 $ 0 $ 0
Issued (in dollars per share) | $ / shares     24.90   20.39
Forfeited (in dollars per share) | $ / shares     19.10   21.10
Outstanding at end of period (in dollars per share) | $ / shares $ 21.44   21.44   $ 20.36
SARs and Restricted Stock Grants Outstanding and Exercisable [Abstract]          
Minimum Range of Exercise Prices (in dollars per share) | $ / shares     19.10    
Maximum Range of Exercise Prices (in dollars per share) | $ / shares     $ 24.90    
Outstanding (in shares) | shares 190,500   190,500    
Weighted- Average Remaining Contractual Life     3 years 8 months 12 days    
Weighted- Average Exercise Price (in dollars per share) | $ / shares $ 21.44   $ 21.44    
Exercisable (in shares) | shares 20,670   20,670    
Exercisable, Weighted- Average Remaining Contractual life     3 years 4 months 24 days    
Exercisable, Weighted- Average Exercise Price (in dollars per share) | $ / shares $ 19.10   $ 19.10    
Stock Options [Member]          
Number of Units, Stock Appreciation Rights (SARs) [Roll Forward]          
Issued (in shares) | shares 0 0      
Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Abstract]          
Restricted stock granted (in shares) | shares 0 0 0   25,000
Number of Units, Restricted Stock [Roll Forward]          
Outstanding at beginning of period (in shares) | shares     25,000 0 0
Issued (in shares) | shares 0 0 0   25,000
Forfeited (in shares) | shares     0   0
Outstanding at end of period (in shares) | shares 25,000   25,000   25,000
Weighted - Average Exercise Price, Restricted Stock [Abstract]          
Outstanding at beginning of period (in dollars per share) | $ / shares     $ 0 $ 0 $ 0
Issued (in dollars per share) | $ / shares     0   0
Forfeited (in dollars per share) | $ / shares     0   0
Outstanding at end of period (in dollars per share) | $ / shares $ 0   0   $ 0
SARs and Restricted Stock Grants Outstanding and Exercisable [Abstract]          
Maximum Range of Exercise Prices (in dollars per share) | $ / shares     $ 0    
Outstanding (in shares) | shares 25,000   25,000    
Weighted- Average Remaining Contractual Life     3 years 8 months 12 days    
Weighted- Average Exercise Price (in dollars per share) | $ / shares $ 0   $ 0    
Exercisable (in shares) | shares 0   0    
Exercisable, Weighted- Average Remaining Contractual life     0 years    
Exercisable, Weighted- Average Exercise Price (in dollars per share) | $ / shares $ 0   $ 0    
SARs and Restricted Stock [Member]          
SARs and Restricted Stock Grants Outstanding and Exercisable [Abstract]          
Outstanding SARs and grants, intrinsic value | $ $ 2,019,000   $ 2,019,000    
2010 Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Abstract]          
Shares available for future grant (in shares) | shares 275,000   275,000