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Amount of operating lease income from variable lease payments paid and payable to lessor, excluding amount included in measurement of lease receivable.

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Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Leases (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
Leases (Narrative) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Leases [Abstract]
Operating Leases, Rent Expense, Net		$ 9,000
Operating Lease, Variable Lease Income	$ 13,700
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	7,808,952		$ 7,628,592
Other Energy Equipment [Member] \| Property Subject to Operating Lease [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	229,600
Containers [Member] \| Property Subject to Operating Lease [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	74,500
Pipelines [Member] \| Property Subject to Operating Lease [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	44,300
Property, Plant and Equipment, Other Types [Member] \| Property Subject to Operating Lease [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 27,900