| Document and Entity Information | Aug. 01, 2019 |
| Document and Entity Information [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Aug. 1, 2019 |
| Entity Registrant Name | GLOBUS MEDICAL, INC. |
| Entity Emerging Growth Company | false |
| Entity Ex Transition Period | false |
| Title of 12(b) Security | Class A Common Stock, par value $.001 per share |
| Trading Symbol | GMED |
| Security Exchange Name | NYSE |
| Entity File Number | 001-35621 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 04-3744954 |
| Entity Address, Address Line One | 2560 GENERAL ARMISTEAD AVENUE |
| Entity Address, City or Town | AUDUBON |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 19403 |
| City Area Code | 610 |
| Local Phone Number | 930-1800 |
| Amendment Flag | false |
| Entity Central Index Key | 0001237831 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
