Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2019	Nov. 01, 2019
Document Information [Line Items]
Entity Registrant Name	Blueknight Energy Partners, L.P.
Entity Central Index Key	0001392091
Trading Symbol	bkep
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Current Reporting Status	Yes
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Document Type	10-Q
Document Period End Date	Sep. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Amendment Flag	false
Title of 12(b) Security	Common Units
Common Unit [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding (in shares)		40,813,488
Series A Preferred Unit [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding (in shares)		35,125,202