Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 29, 2015	Dec. 30, 2014
Components of accrued liabilities
Payroll and vacation	$ 19,279	$ 16,535
Sales tax payable	5,648	4,978
Other	19,920	21,884
Total Accrued liabilities	$ 44,847	$ 43,397