Segment Reporting (Reconciliation Of Restaurant-Level EBITDA To Operating Income) (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended	3 Months Ended
	Mar. 07, 2013	Mar. 25, 2014	Mar. 19, 2013
Segment Reporting [Abstract]
Restaurant-level EBITDA		$ 14,779	$ 13,929
Less: Pre-opening costs		384	591
Less: General and administrative		4,686	3,775
Less: Public offering costs	400	5	412
Less: Public offering transaction bonuses			1,805
Less: Depreciation and amortization		2,955	2,442
Operating income		$ 6,749	$ 4,904