Selected Quarterly Financial Data (unaudited) (Details) (USD $)	0 Months Ended	3 Months Ended									12 Months Ended
	Dec. 31, 2013	Dec. 30, 2014	Sep. 30, 2014	Jul. 01, 2014	Apr. 01, 2014	Dec. 31, 2013 restaurant	Sep. 24, 2013	Jun. 25, 2013	Mar. 26, 2013	Dec. 25, 2012 restaurant	Dec. 30, 2014	Dec. 31, 2013	Dec. 25, 2012 restaurant
Selected quarterly financial data
Revenue	$ 32,000,000	$ 404,425,000	$ 385,218,000	$ 395,363,000	$ 397,142,000	$ 376,020,000	$ 334,770,000	$ 352,119,000	$ 359,676,000		$ 1,582,148,000	$ 1,422,585,000	$ 1,263,331,000
Total costs and expenses		377,382,000	356,397,000	360,962,000	356,958,000	349,966,000	309,074,000	322,322,000	321,508,000		1,451,699,000	1,302,870,000	1,152,873,000
Income from operations		27,043,000	28,821,000	34,401,000	40,184,000	26,054,000	25,696,000	29,797,000	38,168,000		130,449,000	119,715,000	110,458,000
Net income attributable to Texas Roadhouse, Inc. and subsidiaries		18,595,000	18,881,000	23,081,000	26,465,000	17,119,000	17,170,000	19,963,000	26,171,000		87,022,000	80,423,000	71,170,000
Basic EPS (in dollars per share)		$ 0.27	$ 0.27	$ 0.33	$ 0.38	$ 0.24	$ 0.24	$ 0.29	$ 0.38		$ 1.25	$ 1.15	$ 1.02
Diluted EPS (in dollars per share)		$ 0.26	$ 0.27	$ 0.33	$ 0.37	$ 0.24	$ 0.24	$ 0.28	$ 0.37		$ 1.23	$ 1.13	$ 1.00
Cash dividends declared per share (in dollars per share)		$ 0.15	$ 0.15	$ 0.15	$ 0.15	$ 0.12	$ 0.12	$ 0.12	$ 0.12		$ 0.60	$ 0.48	$ 0.46
Impairment of goodwill		600,000									626,000	0	300,000
Impairment of goodwill, net of tax		400,000
Gain on sale of Aspen Creek concept and restaurants						1,800,000						1,800,000
Gain on sale of Aspen Creek concept and restaurants, after tax						$ 1,200,000
Number of restaurants impaired						2				1			1
Minimum
Selected quarterly financial data
Diluted EPS (in dollars per share)	$ 0.03					$ 0.03
Maximum
Selected quarterly financial data
Diluted EPS (in dollars per share)	$ 0.04					$ 0.04