Nature of Operations and Basis of Presentation - Additional Information (Detail)	3 Months Ended
	Mar. 27, 2018 Restaurant License Franchise shares
Nature Of Operations And Basis Of Accounting Presentation [Line Items]
Place of formation	Delaware
Date of formation	Jul. 24, 2014
Common units held	5,578,616
Voting rights description	Each share of Class B common stock provides its holder with no economic rights but entitles the holder to one vote on matters presented to The Habit Restaurants, Inc.’s stockholders. Holders of Class A common stock and Class B common stock generally vote together as a single class on all matters presented to our stockholders for their vote or approval, except as otherwise required by applicable law.
Number of fast casual restaurants | Restaurant	204
Number of license agreements | License	3
Number of franchise agreements | Franchise	6
Number of licensed location | License	3
Number of franchise location | Franchise	15
Restricted Stock Units (RSUs) [Member]
Nature Of Operations And Basis Of Accounting Presentation [Line Items]
Units, vested	43,328
Units, forfeited	4,976
Class B Common Stock [Member]
Nature Of Operations And Basis Of Accounting Presentation [Line Items]
Conversion of common stock	67,069
Habit Restaurants, LLC [Member]
Nature Of Operations And Basis Of Accounting Presentation [Line Items]
Common units held	20,488,849
Economic interest	78.60%
Units, forfeited	887