SCHEDULE I: CONDENSED FINANCIAL INFORMATION OF REGISTRANT - BALANCE SHEET ADDITIONAL INFORMATION (Details) - $ / shares	Dec. 28, 2016	Dec. 30, 2015	Feb. 04, 2015
Condensed Balance Sheet Statements, Captions [Line Items]
Preferred stock, par value (in dollars per share)	$ 0.000	$ 0.000
Preferred stock, shares authorized	10,000,000	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock par value (in dollars per share)
Common stock, shares authorized
Common stock, shares, issued
Common stock, shares, outstanding
Parent Company
Condensed Balance Sheet Statements, Captions [Line Items]
Preferred stock, par value (in dollars per share)	$ 0
Preferred stock, shares authorized	10,000,000
Preferred stock, shares issued	0
Preferred stock, shares outstanding	0
Common stock par value (in dollars per share)		$ 0.01
Common stock, shares authorized		100
Common stock, shares, issued		0
Common stock, shares, outstanding		0
Class A Common Stock
Condensed Balance Sheet Statements, Captions [Line Items]
Common stock par value (in dollars per share)	$ 0.001	$ 0.001	$ 0.001
Common stock, shares authorized	200,000,000	200,000,000	200,000,000
Common stock, shares, issued	25,151,384	19,789,259
Common stock, shares, outstanding	25,151,384	19,789,259
Class A Common Stock \| Parent Company
Condensed Balance Sheet Statements, Captions [Line Items]
Common stock par value (in dollars per share)	$ 0.001
Common stock, shares authorized	200,000,000
Common stock, shares, issued	19,789,259
Common stock, shares, outstanding	19,789,259
Class B Common Stock
Condensed Balance Sheet Statements, Captions [Line Items]
Common stock par value (in dollars per share)	$ 0.001	$ 0	$ 0.001
Common stock, shares authorized	35,000,000	35,000,000	35,000,000
Common stock, shares, issued	11,253,592	16,460,741
Common stock, shares, outstanding	11,253,592	16,460,741
Class B Common Stock \| Parent Company
Condensed Balance Sheet Statements, Captions [Line Items]
Common stock par value (in dollars per share)	$ 0.001
Common stock, shares authorized	35,000,000
Common stock, shares, issued	16,460,741
Common stock, shares, outstanding	16,460,741

Face amount or stated value per share of common stock.

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- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

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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

Face amount per share of no-par value preferred stock nonredeemable or redeemable solely at the option of the issuer.

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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.

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Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

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