XML 29 R1.htm IDEA: XBRL DOCUMENT v3.6.0.2
Document and Entity Information Document - USD ($)
 12 Months Ended
Dec. 28, 2016
Mar. 01, 2017
Jun. 29, 2016
Document Information [Line Items]      
Document type 10-K    
Amendment flag false    
Document period end date Dec. 28, 2016    
Document fiscal year focus 2016    
Document fiscal period focus Q4    
Entity registrant name Shake Shack Inc.    
Entity central index key 0001620533    
Current fiscal year end date --12-28    
Entity filer category Accelerated Filer    
Entity current reporting status Yes    
Entity Public Float     $ 647,570,019
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Class A Common Stock      
Document Information [Line Items]      
Entity common stock, shares outstanding   25,470,089  
Class B Common Stock      
Document Information [Line Items]      
Entity common stock, shares outstanding   10,937,592