Document And Entity Information - shares
9 Months Ended
Sep. 30, 2017
Oct. 31, 2017
Document And Entity Information[Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2017  
Document Fiscal Period Focus Q3  
Document Fiscal Year Focus 2017  
Entity Registrant Name Crocs, Inc.  
Entity Central Index Key 0001334036  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Common stock outstanding (shares)   69,667,827
Trading Symbol CROX