Fixed Assets and Asset Retirement Obligations (Schedule of Fixed Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	$ 6,500,897	$ 5,865,038
Less: Accumulated depreciation	(1,972,596)	(1,768,465)
Net fixed assets	4,528,301	4,096,573
Crude oil and natural gas pipelines and related assets
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	2,945,215	2,844,288
Onshore facilities, machinery, and equipment
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	271,271	269,949
Onshore facilities, machinery, and equipment | Alkali Business
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	1,147,291	701,313
Transportation equipment
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	24,913	22,340
Marine vessels
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	1,021,080	1,017,087
Land, buildings and improvements
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	293,733	231,651
Office equipment, furniture and fixtures
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	25,029	24,271
Construction in progress(1)
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	731,197	712,971
Other
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	$ 41,168	$ 41,168