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NON-CONTROLLING INTERESTS - Changes in Ownership Interests in SSE Holdings (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 27, 2017 | Sep. 28, 2016 | Sep. 27, 2017 | Sep. 28, 2016
Noncontrolling Interest [Line Items] |  |  |  |
Net Income (Loss) Attributable to Parent | $ 4,997 | $ 3,766 | $ 12,143 | $ 8,526
Net unrealized losses related to available-for-sale securities | 67 | (8) | 64 | (16)
Total effect of changes in ownership interest on equity attributable to Shake Shack Inc. | 5,963 | 8,486 | 18,651 | 24,023
Redemption or Exchange of Units |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |
Increase (decrease) in additional paid-in capital | 841 | 4,708 | 2,883 | 15,086
Employee Stock Option |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |
Increase (decrease) in additional paid-in capital | 78 | 17 | 3,580 | 421
Accumulated Other Comprehensive Loss |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |
Net unrealized losses related to available-for-sale securities | $ 47 | $ (5) | $ 45 | $ (10)

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- Definition The increase (decrease) during the period impacting the parent's ownership interest in a subsidiary as it relates to the total (consolidated) equity attributable to the parent. The changes to the parent's ownership interest in a subsidiary represented by this element did not arise in a deconsolidation of the subsidiary from the consolidated financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84161450&loc=SL4573702-111684 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4M -URI http://asc.fasb.org/extlink&oid=84234705&loc=SL4591554-111686 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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