Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2019	May 03, 2019
Entity Information [Line Items]
Entity Registrant Name	GENESIS ENERGY LP
Entity Central Index Key	0001022321
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Small Business	false
Entity Emerging Growth Company	false
Class A Common Units
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		122,539,221
Class B Common Units
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		39,997