Quarterly Financial Data (Summary Of Quarterly Financial Data) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2011		Sep. 30, 2011		Jun. 30, 2011		Mar. 31, 2011		Dec. 31, 2010		Sep. 30, 2010		Jun. 30, 2010		Mar. 31, 2010		Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Quarterly Financial Data [Abstract]
Revenues	$ 806,881		$ 830,200		$ 762,790		$ 689,798		$ 602,243	[1]	$ 576,012		$ 456,538		$ 466,531		$ 3,089,669		$ 2,101,324		$ 1,435,360
Operating income (loss)	15,057		28,632		25,931		12,832		(65,904)	[1]	10,183		18,299		10,038		82,452		(27,384)		21,371
Net income (loss)									(74,650)	[1]	3,863		13,921		6,325		51,249		(50,541)		6,178
Net income (loss) attributable to Genesis Energy, L.P.	7,773		19,088		17,358		7,030		(74,650)	[1]	5,068		14,238		6,885		51,249		(48,459)		8,063
Net income per common unit-basic and diluted	$ 0.10		$ 0.27		$ 0.27		$ 0.11		$ 0.02	[1]	$ 0.12		$ 0.29		$ 0.06		$ 0.75		$ 0.49
Cash distributions per common unit	$ 0.4275	[2]	$ 0.4150	[2]	$ 0.4075	[2]	$ 0.4000	[2]	$ 0.3875	[1],[2]	$ 0.3750	[2]	$ 0.3675	[2]	$ 0.3600	[2]	$ 1.6500	[2]	$ 1.4900	[2]
Non-cash compensation charge									$ 75,600										$ 76,923		$ 14,104

[1] Includes executive compensation expense related to Series B and Class B awards borne entirely by our general partner in the amounts of $75.6 million (see Note 15).

[2] Represents cash distributions declared and paid in the applicable period.