Condensed Consolidating Financial Information (Condensed Consolidating Statement Of Cash Flows) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	$ 183,954	$ 103,672
Payments to acquire fixed and intangible assets	(126,580)	(247,416)
Cash distributions received from equity investees - return of investment	10,323	11,851
Investments in equity investees	0	(1,135)
Payments to Acquire Businesses, Gross	(759)	(25,394)
Increase (Decrease) in Due to Affiliates	0	0
Repayments on loan to non-guarantor subsidiary	0	0
Proceeds from Contribution in Aid of Construction	124	8,940
Proceeds from asset sales	38,237	3,183
Other, net	0	107
Net cash used in investing activities	(78,655)	(249,864)
Borrowings on senior secured credit facility	410,700	631,900
Repayments on senior secured credit facility	(477,900)	(341,100)
Debt issuance costs	(7,536)	(1,539)
Intercompany transfers	0	0
Issuance of common units for cash, net	140,537	0
Distributions to partners/owners	(171,993)	(146,021)
Contributions from noncontrolling interest	725	0
Other, net	3,216	607
Net cash provided by financing activities	(102,251)	143,847
Net increase in cash and cash equivalents	3,048	(2,345)
Cash and cash equivalents at beginning of period	7,029	10,895
Cash and cash equivalents at end of period	10,077	8,550
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	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	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
Debt issuance costs	0	0
Intercompany transfers	0	0
Issuance of common units for cash, net	0
Distributions to partners/owners	0	0
Contributions from noncontrolling interest	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 | Genesis Energy, L.P. (Parent and Co-Issuer)
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	102,991	80,297
Payments to acquire fixed and intangible assets	0	0
Cash distributions received from equity investees - return of investment	0	0
Investments in equity investees	(140,537)	0
Payments to Acquire Businesses, Gross	0	0
Increase (Decrease) in Due to Affiliates	143,738	(223,537)
Repayments on loan to non-guarantor subsidiary	0	0
Proceeds from Contribution in Aid of Construction	0	0
Proceeds from asset sales	0	0
Other, net	0	0
Net cash used in investing activities	3,201	(223,537)
Borrowings on senior secured credit facility	410,700	631,900
Repayments on senior secured credit facility	(477,900)	(341,100)
Debt issuance costs	(7,536)	(1,539)
Intercompany transfers	0	0
Issuance of common units for cash, net	140,537
Distributions to partners/owners	(171,993)	(146,021)
Contributions from noncontrolling interest	0
Other, net	0	0
Net cash provided by financing activities	(106,192)	143,240
Net increase in cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	6	6
Cash and cash equivalents at end of period	6	6
Reportable Legal Entities | Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	242,004	154,169
Payments to acquire fixed and intangible assets	(126,580)	(247,416)
Cash distributions received from equity investees - return of investment	10,323	11,851
Investments in equity investees	0	(1,135)
Payments to Acquire Businesses, Gross	(759)	(25,394)
Increase (Decrease) in Due to Affiliates	0	0
Repayments on loan to non-guarantor subsidiary	3,296	2,979
Proceeds from Contribution in Aid of Construction	124	8,940
Proceeds from asset sales	38,237	3,183
Other, net	0	107
Net cash used in investing activities	(75,359)	(246,885)
Borrowings on senior secured credit facility	0	0
Repayments on senior secured credit facility	0	0
Debt issuance costs	0	0
Intercompany transfers	(135,170)	236,775
Issuance of common units for cash, net	140,537
Distributions to partners/owners	(171,993)	(146,021)
Contributions from noncontrolling interest	0
Other, net	3,216	607
Net cash provided by financing activities	(163,410)	91,361
Net increase in cash and cash equivalents	3,235	(1,355)
Cash and cash equivalents at beginning of period	6,360	8,288
Cash and cash equivalents at end of period	9,595	6,933
Reportable Legal Entities | Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	646	4,918
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	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	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
Debt issuance costs	0	0
Intercompany transfers	(8,568)	(13,238)
Issuance of common units for cash, net	0
Distributions to partners/owners	0	0
Contributions from noncontrolling interest	725
Other, net	7,010	7,330
Net cash provided by financing activities	(833)	(5,908)
Net increase in cash and cash equivalents	(187)	(990)
Cash and cash equivalents at beginning of period	663	2,601
Cash and cash equivalents at end of period	476	1,611
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	(161,687)	(135,712)
Payments to acquire fixed and intangible assets	0	0
Cash distributions received from equity investees - return of investment	0	0
Investments in equity investees	140,537	0
Payments to Acquire Businesses, Gross	0	0
Increase (Decrease) in Due to Affiliates	(143,738)	223,537
Repayments on loan to non-guarantor subsidiary	(3,296)	(2,979)
Proceeds from Contribution in Aid of Construction	0	0
Proceeds from asset sales	0	0
Other, net	0	0
Net cash used in investing activities	(6,497)	220,558
Borrowings on senior secured credit facility	0	0
Repayments on senior secured credit facility	0	0
Debt issuance costs	0	0
Intercompany transfers	143,738	(223,537)
Issuance of common units for cash, net	(140,537)
Distributions to partners/owners	171,993	146,021
Contributions from noncontrolling interest	0
Other, net	(7,010)	(7,330)
Net cash provided by financing activities	168,184	(84,846)
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