Debt, Aggregate Annual Maturities and Net Interest Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 26, 2015	Dec. 27, 2014
Aggregate annual maturities of debt [Abstract]
2017	$ 13,655
2018	9,212
2019	1,222
2020	1,222
2021	200,472
Thereafter	2,538
Long-term debt	228,321
Net interest expense [Abstract]
Interest expense	7,749	$ 8,335	$ 6,393
Capitalized interest	(362)	(668)	(653)
Net interest expense	7,387	7,667	5,740
Interest paid	$ 7,100	$ 8,100	$ 5,700