Condensed Consolidating Financial Information (Condensed Consolidating Statement Of Cash Flows) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	$ 103,672	$ 71,102
Payments to acquire fixed and intangible assets	(247,416)	(240,646)
Cash distributions received from equity investees - return of investment	11,851	11,490
Investments in equity investees	(1,135)	(1,750)
Payments to Acquire Businesses, Gross	25,394	0
Increase (Decrease) in Due to Affiliates	0	0
Repayments on loan to non-guarantor subsidiary	0	0
Proceeds from Contribution in Aid of Construction	8,940	0
Proceeds from asset sales	3,183	2,228
Other, net	107	(729)
Net cash used in investing activities	(249,864)	(229,407)
Borrowings on senior secured credit facility	631,900	550,500
Repayments on senior secured credit facility	(341,100)	(515,700)
Proceeds from issuance of senior unsecured notes	0	400,000
Repayment of senior unsecured notes	0	(350,000)
Debt issuance costs	1,539	8,418
Intercompany transfers	0	0
Issuance of common units for cash, net	0	197,722
Distributions to partners/owners	(146,021)	(117,316)
Other, net	607	774
Net cash provided by financing activities	143,847	157,562
Net increase in cash and cash equivalents	(2,345)	(743)
Cash and cash equivalents at beginning of period	10,895	9,462
Cash and cash equivalents at end of period	8,550	8,719
Reportable Legal Entities | Genesis Energy, L.P. (Parent and Co-Issuer)
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	80,297	(2,724)
Payments to acquire fixed and intangible assets	0	0
Cash distributions received from equity investees - return of investment	0	71,787
Investments in equity investees	0	(197,722)
Payments to Acquire Businesses, Gross	0
Increase (Decrease) in Due to Affiliates	(223,537)	(28,132)
Repayments on loan to non-guarantor subsidiary	0	0
Proceeds from Contribution in Aid of Construction	0
Proceeds from asset sales	0	0
Other, net	0	0
Net cash used in investing activities	(223,537)	(154,067)
Borrowings on senior secured credit facility	631,900	550,500
Repayments on senior secured credit facility	(341,100)	(515,700)
Proceeds from issuance of senior unsecured notes		400,000
Repayment of senior unsecured notes		(350,000)
Debt issuance costs	1,539	8,418
Intercompany transfers	0	0
Issuance of common units for cash, net		197,722
Distributions to partners/owners	(146,021)	(117,316)
Other, net	0	0
Net cash provided by financing activities	143,240	156,788
Net increase in cash and cash equivalents	0	(3)
Cash and cash equivalents at beginning of period	6	9
Cash and cash equivalents at end of period	6	6
Reportable Legal Entities | Genesis Energy Finance Corporation (Co-Issuer)
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	0	0
Payments to acquire fixed and intangible assets	0	0
Cash distributions received from equity investees - return of investment	0	0
Investments in equity investees	0	0
Payments to Acquire Businesses, Gross	0
Increase (Decrease) in Due to Affiliates	0	0
Repayments on loan to non-guarantor subsidiary	0	0
Proceeds from Contribution in Aid of Construction	0
Proceeds from asset sales	0	0
Other, net	0	0
Net cash used in investing activities	0	0
Borrowings on senior secured credit facility	0	0
Repayments on senior secured credit facility	0	0
Proceeds from issuance of senior unsecured notes		0
Repayment of senior unsecured notes		0
Debt issuance costs	0	0
Intercompany transfers	0	0
Issuance of common units for cash, net		0
Distributions to partners/owners	0	0
Other, net	0	0
Net cash provided by financing activities	0	0
Net increase in cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	0	0
Reportable Legal Entities | Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	154,169	102,165
Payments to acquire fixed and intangible assets	(247,416)	(240,646)
Cash distributions received from equity investees - return of investment	11,851	11,490
Investments in equity investees	(1,135)	(1,750)
Payments to Acquire Businesses, Gross	25,394
Increase (Decrease) in Due to Affiliates	0	0
Repayments on loan to non-guarantor subsidiary	2,979	2,692
Proceeds from Contribution in Aid of Construction	8,940
Proceeds from asset sales	3,183	2,228
Other, net	107	(729)
Net cash used in investing activities	(246,885)	(226,715)
Borrowings on senior secured credit facility	0	0
Repayments on senior secured credit facility	0	0
Proceeds from issuance of senior unsecured notes		0
Repayment of senior unsecured notes		0
Debt issuance costs	0	0
Intercompany transfers	236,775	43,059
Issuance of common units for cash, net		197,722
Distributions to partners/owners	(146,021)	(117,316)
Other, net	607	774
Net cash provided by financing activities	91,361	124,239
Net increase in cash and cash equivalents	(1,355)	(311)
Cash and cash equivalents at beginning of period	8,288	8,310
Cash and cash equivalents at end of period	6,933	7,999
Reportable Legal Entities | Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	4,918	17,167
Payments to acquire fixed and intangible assets	0	0
Cash distributions received from equity investees - return of investment	0	0
Investments in equity investees	0	0
Payments to Acquire Businesses, Gross	0
Increase (Decrease) in Due to Affiliates	0	0
Repayments on loan to non-guarantor subsidiary	0	0
Proceeds from Contribution in Aid of Construction	0
Proceeds from asset sales	0	0
Other, net	0	0
Net cash used in investing activities	0	0
Borrowings on senior secured credit facility	0	0
Repayments on senior secured credit facility	0	0
Proceeds from issuance of senior unsecured notes		0
Repayment of senior unsecured notes		0
Debt issuance costs	0	0
Intercompany transfers	(13,238)	(14,927)
Issuance of common units for cash, net		0
Distributions to partners/owners	0	0
Other, net	7,330	(2,669)
Net cash provided by financing activities	(5,908)	(17,596)
Net increase in cash and cash equivalents	(990)	(429)
Cash and cash equivalents at beginning of period	2,601	1,143
Cash and cash equivalents at end of period	1,611	714
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	(135,712)	(45,506)
Payments to acquire fixed and intangible assets	0	0
Cash distributions received from equity investees - return of investment	0	(71,787)
Investments in equity investees	0	197,722
Payments to Acquire Businesses, Gross	0
Increase (Decrease) in Due to Affiliates	223,537	28,132
Repayments on loan to non-guarantor subsidiary	(2,979)	(2,692)
Proceeds from Contribution in Aid of Construction	0
Proceeds from asset sales	0	0
Other, net	0	0
Net cash used in investing activities	220,558	151,375
Borrowings on senior secured credit facility	0	0
Repayments on senior secured credit facility	0	0
Proceeds from issuance of senior unsecured notes		0
Repayment of senior unsecured notes		0
Debt issuance costs	0	0
Intercompany transfers	(223,537)	(28,132)
Issuance of common units for cash, net		(197,722)
Distributions to partners/owners	146,021	117,316
Other, net	(7,330)	2,669
Net cash provided by financing activities	(84,846)	(105,869)
Net increase in cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	$ 0	$ 0