SEGMENT REPORTING - Reconciliation of Restaurant-Level Earning Before Income Taxes Depreciation Amortization to Operating Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 11, 2013	Mar. 19, 2013	Jun. 12, 2012	Jun. 11, 2013	Jun. 12, 2012
Segment Reporting [Abstract]
Restaurant-level EBITDA	$ 13,990		$ 12,525	$ 27,919	$ 25,931
Less pre-opening costs	328		832	919	902
Less general and administrative	4,163		2,754	7,938	5,400
Less management and accounting fees paid to related party			452		1,196
Less secondary public offering costs				412
Less public offering transaction bonuses		1,805		1,805
Less depreciation and amortization	2,564		1,876	5,006	3,570
Operating income	$ 6,935		$ 6,611	$ 11,839	$ 14,863