Annual report pursuant to Section 13 and 15(d)

Income Taxes (Narrative)(Details)

v3.3.1.900
Income Taxes (Narrative)(Details) - USD ($)
12 Months Ended
Dec. 27, 2015
Dec. 28, 2014
Dec. 29, 2013
Income Tax Contingency [Line Items]      
Deferred Tax Assets, Operating Loss Carryforwards $ 0 $ 643,000  
Excess Tax Benefit From Share Based Compensation 93,100 1,700,000  
Excess tax benefit from stock-based compensation 34,000 609,000 $ 3,990,000
Deferred Tax Assets, Tax Credit Carryforwards, General Business $ 8,135,000 $ 10,121,000  
Maximum [Member]      
Income Tax Contingency [Line Items]      
Tax Credit Carryforward, Expiration Date Dec. 31, 2033