| Cover Document | Oct. 01, 2019 |
| Cover page. | |
| Title of 12(b) Security | Common Stock, par value $0.001 per share |
| Document Type | 8-K |
| Document Period End Date | Oct. 1, 2019 |
| Entity Registrant Name | Ensign Group, Inc |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-33757 |
| Entity Tax Identification Number | 33-0861263 |
| Entity Address, Address Line One | 29222 Rancho Viejo Road, Suite 127, |
| Entity Address, City or Town | San Juan Capistrano, |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 92675 |
| City Area Code | 949 |
| Local Phone Number | 487-9500 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001125376 |
| Amendment Flag | false |
| Trading Symbol | ENSG |
| Security Exchange Name | NASDAQ |
