Segment Reporting (Reconciliation Of Restaurant-Level EBITDA To Operating Income) (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended			3 Months Ended						4 Months Ended		12 Months Ended
	Dec. 04, 2013	Jul. 25, 2013	Mar. 07, 2013	Sep. 03, 2013	Jun. 11, 2013	Mar. 19, 2013	Sep. 04, 2012	Jun. 12, 2012	Mar. 20, 2012	Dec. 31, 2013	Dec. 25, 2012	Dec. 31, 2013	Dec. 25, 2012	Dec. 27, 2011
Segment Reporting [Abstract]
Restaurant-level EBITDA												$ 62,109	$ 56,517	$ 47,325
Less: Pre-opening costs												3,758	4,058	3,018
Less: General and administrative												17,421	13,449	10,640
Management and accounting fees paid to related party													1,252	3,399
Less: Asset advisory agreement termination fee													3,000
Less: Public offering costs	231	381	412	381		412				231		1,024
Less: Public offering transaction bonuses												8,355	1,462
Less: Non-cash impairment charges										2,360		2,360
Less: Depreciation and amortization												11,300	8,675	6,998
Operating income				$ (759)	$ 6,935	$ 4,904	$ (923)	$ 6,611	$ 8,253	$ 6,811	$ 10,680	$ 17,891	$ 24,621	$ 23,270