| Document And Entity Information | Jul. 22, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jul. 22, 2021 |
| Entity Registrant Name | SKECHERS USA INC |
| Entity Central Index Key | 0001065837 |
| Entity Emerging Growth Company | false |
| Entity File Number | 001-14429 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 95-4376145 |
| Entity Address, Address Line One | 228 Manhattan Beach Boulevard |
| Entity Address, City or Town | Manhattan Beach |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 90266 |
| City Area Code | 310 |
| Local Phone Number | 318-3100 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class A Common Stock, par value of $0.001 per share |
| Trading Symbol | SKX |
| Security Exchange Name | NYSE |
