Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2014	Sep. 24, 2013	Sep. 30, 2014	Sep. 24, 2013
Antidilutive securities
Anti-dilutive securities (in shares)				29,155
Earnings per share
Net income attributable to Texas Roadhouse, Inc. and subsidiaries	$ 18,881	$ 17,170	$ 68,427	$ 63,304
Basic EPS:
Weighted-average common shares outstanding	69,544,000	70,361,000	69,793,000	69,914,000
Basic EPS (in dollars per share)	$ 0.27	$ 0.24	$ 0.98	$ 0.91
Diluted EPS:
Weighted-average common shares outstanding	69,544,000	70,361,000	69,793,000	69,914,000
Dilutive effect of stock options and nonvested stock (in shares)	851,000	1,259,000	846,000	1,261,000
Shares - diluted	70,395,000	71,620,000	70,639,000	71,175,000
Diluted EPS (in dollars per share)	$ 0.27	$ 0.24	$ 0.97	$ 0.89
Nonvested stock
Antidilutive securities
Anti-dilutive securities (in shares)				29,155

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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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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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