Document And Entity Information - shares
6 Months Ended
Jun. 30, 2018
Jul. 31, 2018
Document And Entity Information[Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2018  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2018  
Entity Registrant Name Crocs, Inc.  
Entity Central Index Key 0001334036  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Common stock outstanding (shares)   68,094,302
Trading Symbol CROX