| Document and Entity Information Document | Oct. 30, 2019 |
| Cover page. | |
| Document Type | 8-K |
| Document Period End Date | Oct. 30, 2019 |
| Entity Registrant Name | CROCS, INC. |
| Entity Central Index Key | 0001334036 |
| Amendment Flag | false |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 0-51754 |
| Entity Tax Identification Number | 20-2164234 |
| Entity Address, Address Line One | 7477 East Dry Creek Parkway |
| Entity Address, City or Town | Niwot, |
| Entity Address, State or Province | CO |
| Entity Address, Postal Zip Code | 80503 |
| City Area Code | 303 |
| Local Phone Number | 848-7000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.001 per share |
| Trading Symbol | CROX |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
