| Document and Entity Information | Feb. 16, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Feb. 16, 2024 |
| Entity File Number | 000-51371 |
| Entity Registrant Name | LINCOLN EDUCATIONAL SERVICES CORPORATION |
| Entity Central Index Key | 0001286613 |
| Entity Incorporation, State or Country Code | NJ |
| Entity Tax Identification Number | 57-1150621 |
| Entity Address, Address Line One | 14 Sylvan Way, Suite A |
| Entity Address, City or Town | Parsippany |
| Entity Address, State or Province | NJ |
| Entity Address, Postal Zip Code | 07054 |
| City Area Code | 973 |
| Local Phone Number | 736-9340 |
| Title of 12(b) Security | Common Stock No Par Value |
| Trading Symbol | LINC |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
