Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Income Taxes [Abstract]
Income taxes at federal statutory rate	$ 17,249	$ 27,658	$ 43,631
State income taxes, net of federal income tax benefit	639	1,306	2,413
Deferred tax on gain on bargain purchase	0	0	(8,358)
Nondeductible employee-related expenses	768	1,828
2017 tax reform	657	(49,336)
Other	85	(847)	(187)
Provision for income taxes	$ 19,398	$ (19,391)	$ 37,499
Effective tax rate	23.60%	(24.50%)	30.10%