Lease Accounting (Narrative) (Details) - Genesis NEJD Pipeline, LLC	3 Months Ended	6 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Oct. 30, 2020 installment
Lessor, Lease, Description [Line Items]
Direct financing lease, number of installments | installment			4
Collections received from direct finance lease receivable	$ 17,500,000	$ 35,000,000.0
Direct finance lease receivable	$ 35,000,000.0	$ 35,000,000.0