Income Taxes (Schedule of Components of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015
Income Taxes [Abstract]
Current Federal Income Tax Expense (Benefit)	$ 10,630	$ 25,908	$ 29,888
Current State Income Tax Expense (Benefit)	1,972	5,888	3,325
Deferred Federal Income Tax Expense (Benefit)	(34,659)	6,020	(188)
Deferred State Income Tax Expense (Benefit)	2,666	(317)	(24)
Provision for income taxes	$ (19,391)	$ 37,499	$ 33,001