Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015
Income Taxes [Abstract]
Income taxes at federal statutory rate	$ 27,658	$ 43,631	$ 32,316
State income taxes, net of federal income tax benefit	1,306	2,413	1,112
Deferred tax on gain on bargain purchase	0	(8,358)	0
Nondeductible employee-related expenses	1,828
2017 tax reform	(49,336)
Other	(847)	(187)	(427)
Provision for income taxes	$ (19,391)	$ 37,499	$ 33,001
Effective tax rate	(24.50%)	30.10%	35.70%