Debt (Narrative) (Details)			3 Months Ended
	Mar. 31, 2026 USD ($)	Mar. 04, 2026 USD ($) segment yr	Mar. 31, 2026 USD ($)	Mar. 31, 2025 USD ($)	Dec. 31, 2025 USD ($)
Debt Instrument [Line Items]
Number of additional years | yr		1,000
Number of occasions, option to extend | segment		2,000
Net Value	$ 3,176,176,000		$ 3,176,176,000		$ 3,046,815,000
SENIOR UNSECURED NOTES, net of debt issuance costs and discount	3,200,000,000		3,200,000,000		3,100,000,000
Proceeds from issuance of senior unsecured notes (Note 10)			750,000,000	$ 0
Repayment of senior unsecured notes			679,877,000	0
Loss on extinguishment of debt			$ 3,540,000	$ 844,000
Senior Notes | Guarantor Subsidiary | Genesis Energy, LLC | Genesis Finance Corporation
Debt Instrument [Line Items]
Percentage of equity interest			100.00%
Senior Secured Credit Facility | Credit Facility
Debt Instrument [Line Items]
Maximum senior secured leverage ratio		2.50
Senior Secured Credit Facility | Credit Facility | Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Maximum consolidated leverage ratio		5.75
Minimum interest coverage ratio		2.00
Senior Secured Credit Facility | Credit Facility | Debt Instrument, Redemption, Period Two
Debt Instrument [Line Items]
Maximum consolidated leverage ratio		5.50
Minimum interest coverage ratio		2.15
Senior Secured Credit Facility | Credit Facility | Debt Instrument, Redemption, Period Three
Debt Instrument [Line Items]
Minimum interest coverage ratio		2.25
7.750% senior unsecured notes due 2028
Debt Instrument [Line Items]
Loss on extinguishment of debt			$ 3,400,000
7.750% senior unsecured notes due 2028 | Senior Notes
Debt Instrument [Line Items]
Net Value	$ 0	$ 150,000,000	$ 0		676,237,000
Interest rate	7.75%	8.875%	7.75%
7.750% senior unsecured notes due 2028 | Unsecured Debt
Debt Instrument [Line Items]
Interest rate		7.75%
Repayment of senior unsecured notes		$ 416,100,000
Extinguishment of Debt, Amount		$ 263,300,000
Senior Notes | 2032 Notes
Debt Instrument [Line Items]
Net Value	$ 690,469,000		$ 690,469,000		690,081,000
Interest rate	7.875%		7.875%
2034 Notes | Unsecured Debt
Debt Instrument [Line Items]
Interest rate		6.75%
Debt Instrument, Face Amount		$ 750,000,000.0
Proceeds from issuance of senior unsecured notes (Note 10)		735,900,000
Revolving Credit Facility | Revolving Loan | Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 900,000,000
Net Value	$ 74,100,000		$ 74,100,000		$ 6,400,000
Line of credit, unused capacity commitment fee percentage	0.50%
Credit facility, additional borrowing capacity	$ 1,300,000,000		1,300,000,000
Credit facility, amount borrowed	74,100,000		74,100,000
Letters of credit, outstanding amount	6,800,000		6,800,000
Remaining borrowing capacity	819,100,000		819,100,000
Revolving Credit Facility | Revolving Loan | Credit Facility | Petroleum Products
Debt Instrument [Line Items]
Credit facility, amount borrowed	17,900,000		$ 17,900,000
Revolving Credit Facility | Revolving Loan | Credit Facility | Maximum
Debt Instrument [Line Items]
Line of credit, unused capacity commitment fee percentage			0.50%
Letters of credit, outstanding amount	$ 50,000,000		$ 50,000,000
Revolving Credit Facility | Revolving Loan | Credit Facility | Minimum
Debt Instrument [Line Items]
Line of credit, unused capacity commitment fee percentage			0.30%
Revolving Credit Facility | Revolving Loan | Credit Facility | Federal Funds Effective Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate			0.50%
Revolving Credit Facility | Revolving Loan | Credit Facility | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	350.00%
Revolving Credit Facility | Revolving Loan | Credit Facility | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Maximum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate			3.50%
Revolving Credit Facility | Revolving Loan | Credit Facility | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Minimum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate			2.25%
Revolving Credit Facility | Revolving Loan | Credit Facility | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | One-month Tenor | Maximum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate			1.00%
Revolving Credit Facility | Revolving Loan | Credit Facility | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Term SOFR Adjustment | Maximum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate			0.10%
Revolving Credit Facility | Revolving Loan | Credit Facility | Alternate Base Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	2.50%
Revolving Credit Facility | Revolving Loan | Credit Facility | Alternate Base Rate | Maximum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate			2.50%
Revolving Credit Facility | Revolving Loan | Credit Facility | Alternate Base Rate | Minimum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate			1.25%
Revolving Credit Facility | Senior Secured Credit Facility | Credit Facility
Debt Instrument [Line Items]
Letter of credit, fee percentage	3.50%
Revolving Credit Facility | Senior Secured Credit Facility | Credit Facility | Maximum
Debt Instrument [Line Items]
Letter of credit, fee percentage			3.50%
Revolving Credit Facility | Senior Secured Credit Facility | Credit Facility | Minimum
Debt Instrument [Line Items]
Letter of credit, fee percentage			2.25%
Bridge Loan | Revolving Loan | Credit Facility | Petroleum Products
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 200,000,000		$ 200,000,000