Partners' Capital And Distributions (Computation Of Basic And Diluted Net Income Per Common Unit) (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, 2009		Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Partners' Capital And Distributions [Abstract]
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
Less: General partner's incentive distribution paid or to be paid for the period		[2]		[2]		[2]		[2]		[2]	(3,147)	[2]	(2,642)	[2]	(2,339)	[2]	(2,037)	[2]		(8,128)	(6,318)
Add: Expense allocable to our general partner																				76,923	18,853
Subtotal																			51,249	20,336	20,598
Less: General partner 2% ownership																				(407)	(412)
Income available for common unitholders																			$ 51,249	$ 19,929	$ 20,186
Denominator for basic and diluted per common unit																			67,938	40,560	39,471
Basic and diluted net income per common unit																			$ 0.75	$ 0.49	$ 0.51

[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] Prior to our IDR Restructuring in December 2010, our general partner received a 2% interest and incremental incentive cash distributions when unitholder's cash distributions exceeded certain target thresholds.