Annual report pursuant to Section 13 and 15(d)

Other Employee Benefit Plans (Details) (Narrative)

v3.6.0.2
Other Employee Benefit Plans (Details) (Narrative) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 26, 2015
Dec. 27, 2014
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]      
Maximum allowed percentage of employee's pre-tax salary contributed to the 401(k) plan 100.00%    
Employer matching contribution, percent of match 75.00%    
Employee contribution, percent of gross pay subject to match 6.00%    
Amount of annual maximum allowed employer matching contributions per employee $ 11,925 $ 11,925 $ 11,700
Amount of the Company's contributions to the 401(k) plan $ 16,000,000 $ 16,000,000 $ 18,000,000