Description of Business and Summary of Significant Accounting Policies (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2018	Dec. 28, 2017	Dec. 29, 2016
Summary of Significant Accounting Policies [Line Items]
Balance at beginning of period	$ 43,492	$ 43,735	$ 44,220
Acquisition	0	0	0
Sale	0	(105)	0
Other	0	0	(347)
Deferred tax adjustment	(322)	(138)	(138)
Balance at end of period	$ 43,170	$ 43,492	$ 43,735