Other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 30, 2015	Dec. 31, 2014
Other Liabilities, Current [Abstract]
Accrued salaries and vacation	$ 30,549	$ 23,928
Accrued insurance, primarily current portion of liability for insurance claims	7,076	6,340
Accrued taxes	7,311	7,129
Accrued advertising	7,737	8,027
Accrued pension	9,648	224
Other	15,227	13,784
Other current liabilities	$ 77,548	$ 59,432