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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 27, 2011	Sep. 28, 2011	Jun. 28, 2011	Mar. 29, 2011	Dec. 28, 2010	Sep. 28, 2010	Jun. 28, 2010	Mar. 29, 2010	Dec. 27, 2011	Dec. 28, 2010	Dec. 29, 2009
Earnings per share
Net income attributable to Texas Roadhouse, Inc. and subsidiaries	$ 12,297	$ 15,798	$ 16,076	$ 19,793	$ 10,060	$ 13,952	$ 15,036	$ 19,241	$ 63,964	$ 58,289	$ 47,479
Basic EPS:
Weighted-average common shares outstanding									70,829	71,432	69,967
Basic EPS (in dollars per share)	$ 0.18	$ 0.22	$ 0.23	$ 0.27	$ 0.14	$ 0.19	$ 0.21	$ 0.27	$ 0.90	$ 0.82	$ 0.68
Diluted EPS:
Weighted-average common shares outstanding									70,829	71,432	69,967
Dilutive effect of stock options and nonvested stock (in shares)									1,449	1,497	1,331
Shares - diluted (in shares)									72,278	72,929	71,298
Diluted EPS (in dollars per share)	$ 0.17	$ 0.22	$ 0.22	$ 0.27	$ 0.14	$ 0.19	$ 0.21	$ 0.27	$ 0.88	$ 0.80	$ 0.67
Options
Antidilutive securities
Anti-dilutive securities (in shares)									521,512	1,798,911	2,861,892
Nonvested stock
Antidilutive securities
Anti-dilutive securities (in shares)										16,546	18,475