Related Party Transactions	6 Months Ended
Jul. 01, 2015
Related Party Transactions [Abstract]
Related Party Transactions	RELATED PARTY TRANSACTIONS Union Square Hospitality Group Union Square Hospitality Group, LLC and its subsidiaries ("USHG") is considered a related party under common control. Under the terms of the management agreement with USHG, as amended, in fiscal 2014, we paid a 2.5% management fee to USHG based on Shack sales and licensing revenue generated from license agreements with unaffiliated entities. Total management fees, which are included in general and administrative expenses, amounted to $697 and $1,289 for the thirteen and twenty-six weeks ended June 25, 2014, respectively. Effective January 1, 2015, the management agreement was amended and restated. As a result, we are no longer obligated to pay management fees to USHG. Therefore, no management fees were paid to USHG for the thirteen and twenty-six weeks ended July 1, 2015. Previously, we sub-leased office space from USHG on a month-to-month basis. Amounts paid to USHG as rent totaled $38 for the twenty-six weeks ended June 25, 2014. These amounts are included in general and administrative expense on the Condensed Consolidated Statements of Income (Loss). No amounts were paid during the thirteen weeks ended June 25, 2014. Previously, our employees were included in USHG's self-insurance health plan and we paid our portion of the plan costs on a monthly basis to USHG. Amounts paid to the USHG for these health insurance costs were $451 and $602 for the thirteen and twenty-six weeks ended June 25, 2014, respectively. In February 2015, we established our own self-funded health insurance plan for our employees and ceased payments to USHG. The total amount paid to USHG for these health insurance costs for the twenty-six weeks ended July 1, 2015 was $188. No amounts were paid to USHG for health insurance costs for the thirteen weeks ended July 1, 2015. These amounts are included in labor and related expenses and general and administrative expenses on the Condensed Consolidated Statements of Income (Loss). Additionally, our employees are eligible participants under USHG's 401(k) plan. We pay our share of the employer's matching contributions directly to the third-party plan trustee. Total amounts payable to the USHG as of July 1, 2015 and December 31, 2014 were $11 and $238, respectively, and are included in other current liabilities on the Condensed Consolidated Balance Sheets. Amounts due from USHG for expenses paid by us on behalf of USHG totaled $29 as of July 1, 2015, which is included in prepaid expenses and other current assets on the Condensed Consolidated Balance Sheets. No amounts were due from USHG as of December 31, 2014. Hudson Yards Sports and Entertainment In fiscal 2011, we entered into a Master License Agreement (an "MLA") with Hudson Yards Sports and Entertainment LLC ("HYSE"), a subsidiary of USHG and a related party, to operate Shake Shack branded limited menu concession stands in certain sports and entertainment venues within the United States. The agreement expires on December 31, 2027 and includes five consecutive five-year renewal options at HYSE's option. As consideration for these rights, HYSE pays us a license fee based on a percentage of net food sales, as defined in the MLA. HYSE also pays us a percentage of profits on sales of branded beverages, as defined in the MLA. Amounts paid to us by HYSE for the thirteen and twenty-six weeks ended July 1, 2015 were $95 and $95, respectively, and $84 and $84 for the thirteen and twenty-six weeks ended June 25, 2014, respectively. Total amounts due from HYSE as of July 1, 2015 were $40. No amounts were due from HYSE as of December 31, 2014 due to the seasonal nature of the concession stands. Madison Square Park Conservancy The Chairman of our Board of Directors is a director of the Madison Square Park Conservancy ("MSP Conservancy"), with which we have a license agreement and pay license fees to operate our Madison Square Park Shack. Amounts paid to Madison Square Park Conservancy as rent amounted to $111 and $111 for the thirteen and twenty-six weeks ended July 1, 2015, respectively, and $186 and $283 for the thirteen and twenty-six weeks ended June 25, 2014, respectively. These amounts are included in occupancy and related expenses on the Condensed Consolidated Statements of Income (Loss). Total amounts due to the MSP Conservancy as of July 1, 2015 were $48. No amounts were due to the MSP Conservancy as of December 31, 2014 as our Madison Square Park Shack was closed for renovations.

RELATED PARTY TRANSACTIONS

Union Square Hospitality Group

Union Square Hospitality Group, LLC and its subsidiaries ("USHG") is considered a related party under common control.

Under the terms of the management agreement with USHG, as amended, in fiscal 2014, we paid a 2.5% management fee to USHG based on Shack sales and licensing revenue generated from license agreements with unaffiliated entities. Total management fees, which are included in general and administrative expenses, amounted to $697 and $1,289 for the thirteen and twenty-six weeks ended June 25, 2014, respectively. Effective January 1, 2015, the management agreement was amended and restated. As a result, we are no longer obligated to pay management fees to USHG. Therefore, no management fees were paid to USHG for the thirteen and twenty-six weeks ended July 1, 2015.

Previously, we sub-leased office space from USHG on a month-to-month basis. Amounts paid to USHG as rent totaled $38 for the twenty-six weeks ended June 25, 2014. These amounts are included in general and administrative expense on the Condensed Consolidated Statements of Income (Loss). No amounts were paid during the thirteen weeks ended June 25, 2014.

Previously, our employees were included in USHG's self-insurance health plan and we paid our portion of the plan costs on a monthly basis to USHG. Amounts paid to the USHG for these health insurance costs were $451 and $602 for the thirteen and twenty-six weeks ended June 25, 2014, respectively. In February 2015, we established our own self-funded health insurance plan for our employees and ceased payments to USHG. The total amount paid to USHG for these health insurance costs for the twenty-six weeks ended July 1, 2015 was $188. No amounts were paid to USHG for health insurance costs for the thirteen weeks ended July 1, 2015. These amounts are included in labor and related expenses and general and administrative expenses on the Condensed Consolidated Statements of Income (Loss). Additionally, our employees are eligible participants under USHG's 401(k) plan. We pay our share of the employer's matching contributions directly to the third-party plan trustee.

Total amounts payable to the USHG as of July 1, 2015 and December 31, 2014 were $11 and $238, respectively, and are included in other current liabilities on the Condensed Consolidated Balance Sheets. Amounts due from USHG for expenses paid by us on behalf of USHG totaled $29 as of July 1, 2015, which is included in prepaid expenses and other current assets on the Condensed Consolidated Balance Sheets. No amounts were due from USHG as of December 31, 2014.

Hudson Yards Sports and Entertainment

In fiscal 2011, we entered into a Master License Agreement (an "MLA") with Hudson Yards Sports and Entertainment LLC ("HYSE"), a subsidiary of USHG and a related party, to operate Shake Shack branded limited menu concession stands in certain sports and entertainment venues within the United States. The agreement expires on December 31, 2027 and includes five consecutive five-year renewal options at HYSE's option. As consideration for these rights, HYSE pays us a license fee based on a percentage of net food sales, as defined in the MLA. HYSE also pays us a percentage of profits on sales of branded beverages, as defined in the MLA. Amounts paid to us by HYSE for the thirteen and twenty-six weeks ended July 1, 2015 were $95 and $95, respectively, and $84 and $84 for the thirteen and twenty-six weeks ended June 25, 2014, respectively. Total amounts due from HYSE as of July 1, 2015 were $40. No amounts were due from HYSE as of December 31, 2014 due to the seasonal nature of the concession stands.

Madison Square Park Conservancy

The Chairman of our Board of Directors is a director of the Madison Square Park Conservancy ("MSP Conservancy"), with which we have a license agreement and pay license fees to operate our Madison Square Park Shack. Amounts paid to Madison Square Park Conservancy as rent amounted to $111 and $111 for the thirteen and twenty-six weeks ended July 1, 2015, respectively, and $186 and $283 for the thirteen and twenty-six weeks ended June 25, 2014, respectively. These amounts are included in occupancy and related expenses on the Condensed Consolidated Statements of Income (Loss). Total amounts due to the MSP Conservancy as of July 1, 2015 were $48. No amounts were due to the MSP Conservancy as of December 31, 2014 as our Madison Square Park Shack was closed for renovations.