| Document And Entity Information | Oct. 26, 2021 |
| Document Information [Line Items] | |
| Entity, Registrant Name | BLUEKNIGHT ENERGY PARTNERS, L.P. |
| Document, Type | 8-K |
| Document, Period End Date | Oct. 26, 2021 |
| Entity, Incorporation, State or Country Code | DE |
| Entity, File Number | 001-33503 |
| Entity, Tax Identification Number | 20-8536826 |
| Entity, Address, Address Line One | 6060 American Plaza, Suite 600 |
| Entity, Address, City or Town | Tulsa |
| Entity, Address, State or Province | OK |
| Entity, Address, Postal Zip Code | 74135 |
| City Area Code | 918 |
| Local Phone Number | 237-4000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity, Emerging Growth Company | false |
| Amendment Flag | false |
| Entity, Central Index Key | 0001392091 |
| CommonUnits Custom [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Common Units |
| Trading Symbol | BKEP |
| Security Exchange Name | NASDAQ |
| SeriesAPreferredUnits Custom [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Series A Preferred Units |
| Trading Symbol | BKEPP |
| Security Exchange Name | NASDAQ |
