Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
Mar. 26, 2019	Mar. 27, 2018
Earnings per share
Net income attributable to Texas Roadhouse, Inc. and subsidiaries	$ 50,390	$ 54,541
Basic EPS:
Weighted-average common shares outstanding (in shares)	71,753,000	71,333,000
Basic EPS (in dollars per share)	$ 0.70	$ 0.76
Diluted EPS:
Weighted-average common shares outstanding (in shares)	71,753,000	71,333,000
Dilutive effect of stock options and nonvested stock (in shares)	434,000	472,000
Shares-diluted (in shares)	72,187,000	71,805,000
Diluted EPS (in dollars per share)	$ 0.70	$ 0.76
Nonvested stock
Antidilutive securities
Anti-dilutive securities (in shares)	0	0

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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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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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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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