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Earnings Per Share (Details) (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 28, 2011	Jun. 29, 2010	Jun. 28, 2011	Jun. 29, 2010
Antidilutive securities
Anti-dilutive securities (in shares)	309,281	1,810,920	309,964	2,198,656
Earnings per share
Net income attributable to Texas Roadhouse, Inc. and subsidiaries	$ 16,076	$ 15,036	$ 35,869	$ 34,277
Basic EPS:
Weighted-average common shares outstanding (in shares)	71,261	71,471	71,654	71,076
Basic EPS (in dollars per share)	$ 0.23	$ 0.21	$ 0.50	$ 0.48
Diluted EPS:
Weighted-average common shares outstanding (in shares)	71,261	71,471	71,654	71,076
Dilutive effect of stock options and restricted stock (in shares)	1,530	1,490	1,602	1,511
Shares - diluted (in shares)	72,791	72,961	73,256	72,587
Diluted EPS (in dollars per share)	$ 0.22	$ 0.21	$ 0.49	$ 0.47
Options
Antidilutive securities
Anti-dilutive securities (in shares)	309,281	1,810,876	309,892	2,195,747
Nonvested stock
Antidilutive securities
Anti-dilutive securities (in shares)		44	72	2,909

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