Management Incentive Plans - Additional Information (Detail) $ / shares in Units, $ in Millions	3 Months Ended
Mar. 27, 2018 USD ($) $ / shares shares
Non-Qualified Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs related to options	$ 3.0
Weighted average period, cost expected to be recognized	3 years 3 months 18 days
Non-Qualified Stock Options [Member] \| Class A Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing stock price of common stock \| $ / shares	$ 8.75
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing stock price of common stock \| $ / shares	$ 8.75
Weighted average period, cost expected to be recognized	3 years 3 months 18 days
Unrecognized stock-based compensation expense related to non-vested restricted stock units	$ 3.2
2014 Omnibus Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incentive plan description	The 2014 Omnibus Incentive Plan is administered by our board of directors or a committee of our board of directors (the “Administrator”). The Administrator has the authority to, among other things, interpret the 2014 Omnibus Incentive Plan, determine eligibility for, grant and determine the terms of awards under the 2014 Omnibus Incentive Plan, and to do all things necessary to carry out the purposes of the 2014 Omnibus Incentive Plan. The Administrator’s determinations under the 2014 Omnibus Incentive Plan are conclusive and binding. The Administrator will determine the time or times at which an award will vest or become exercisable. The maximum term of an award will not exceed ten years from the date of grant.
2014 Omnibus Incentive Plan [Member] \| Options and Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized \| shares	2,525,275
2014 Omnibus Incentive Plan [Member] \| Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award granted expiry date	Nov. 19, 2024
Habit Restaurants LLC Management Incentive Plan [Member] \| Class C Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period, cost expected to be recognized	1 year
Unrecognized stock-based compensation expense related to units	$ 0.8

Unrecognized cost of unvested share-based compensation awards.

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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- Definition

Unrecognized cost of unvested options awarded to employees as compensation.

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- Definition

General descriptive information regarding an arrangement under which employees and directors receive: (a) awards of equity shares, equity share options, or other equity instruments; or (b) the entity incurs liabilities to them: (1) in amounts based, at least in part, on the price of the entity's shares or other equity instruments; or (2) that require or may require settlement by issuance of the entity's shares. Such an arrangement is usually provided to employees and directors to compensate them, provide performance incentives to them, and to attract or retain their services. May also include pertinent information particular to a plan that is not elsewhere specified in the taxonomy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901

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- Definition

Date the equity-based award expires, in CCYY-MM-DD format.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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- Definition

Price of a single share of a number of saleable stocks of a company.

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No definition available.

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