Consolidated Statements Of Operations (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Stock-based compensation expense	$ 2,779	$ 1,651	$ 1,411
Restaurant Wages And Related Expenses [Member]
Stock-based compensation expense	34	50	215
General And Administrative Expense [Member]
Stock-based compensation expense	$ 2,745	$ 1,601	$ 1,196