Document and Entity Information - shares	9 Months Ended
	Sep. 29, 2020	Oct. 28, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 29, 2020
Document Transition Report	false
Entity File Number	000-50972
Entity Registrant Name	Texas Roadhouse, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-1083890
Entity Address, Address Line One	6040 Dutchmans Lane, Suite 200
Entity Address, City or Town	Louisville
Entity Address, State or Province	KY
Entity Address, Postal Zip Code	40205
City Area Code	502
Local Phone Number	426-9984
Title of 12(b) Security	Common Stock
Trading Symbol	TXRH
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		69,482,522
Entity Central Index Key	0001289460
Current Fiscal Year End Date	--12-29
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Amendment Flag	false