Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Details)

v3.3.1.900
Summary of Significant Accounting Policies (Details) - USD ($)
$ / shares in Units, shares in Thousands
 3 Months Ended 12 Months Ended
Jan. 02, 2016
Sep. 26, 2015
Jun. 27, 2015
Mar. 28, 2015
Dec. 27, 2014
Sep. 27, 2014
Jun. 28, 2014
Mar. 29, 2014
Jan. 02, 2016
Dec. 27, 2014
Dec. 28, 2013
Property, Plant and Equipment [Line Items]                      
Reinsurance Purchased For Stop Losses On Individual Basis                 $ 175    
Computation of basic and diluted earnings per common share                      
Net income $ 5,103,000 $ 8,410,000 $ 9,248,000 $ 10,377,000 $ 10,327,000 $ 9,877,000 $ 12,186,000 $ 11,385,000 $ 33,138,000 $ 43,775,000 $ 37,984,000
Weighted average basic shares outstanding                 26,687 26,456 26,206
Basic net income per common share (in dollars per share) $ 0.19 $ 0.32 $ 0.35 $ 0.39 $ 0.39 $ 0.37 $ 0.46 $ 0.43 $ 1.24 $ 1.65 $ 1.45
Effect of dilutive stock options                 0 0 0
Weighted average diluted shares outstanding                 26,687 26,456 26,206
Diluted net income per common share (in dollars per share) $ 0.19 $ 0.32 $ 0.35 $ 0.39 $ 0.39 $ 0.37 $ 0.46 $ 0.43 $ 1.24 $ 1.65 $ 1.45
Reinsurance Purchased For Stop Losses on Aggregate Basis                 $ 7,000    
Computer Equipment [Member] | Minimum [Member]                      
Property, Plant and Equipment [Line Items]                      
Estimated useful life                 3 years    
Computer Equipment [Member] | Maximum [Member]                      
Property, Plant and Equipment [Line Items]                      
Estimated useful life                 5 years    
Machinery and equipment | Minimum [Member]                      
Property, Plant and Equipment [Line Items]                      
Estimated useful life                 4 years    
Machinery and equipment | Maximum [Member]                      
Property, Plant and Equipment [Line Items]                      
Estimated useful life                 12 years    
Furniture and Fixtures [Member] | Minimum [Member]                      
Property, Plant and Equipment [Line Items]                      
Estimated useful life                 4 years    
Furniture and Fixtures [Member] | Maximum [Member]                      
Property, Plant and Equipment [Line Items]                      
Estimated useful life                 10 years    
Buildings | Minimum [Member]                      
Property, Plant and Equipment [Line Items]                      
Estimated useful life                 25 years    
Buildings | Maximum [Member]                      
Property, Plant and Equipment [Line Items]                      
Estimated useful life                 40 years    
Leasehold and land improvements | Minimum [Member]                      
Property, Plant and Equipment [Line Items]                      
Estimated useful life                 10 years    
Leasehold and land improvements | Maximum [Member]                      
Property, Plant and Equipment [Line Items]                      
Estimated useful life                 40 years