Fixed Assets, Mineral Leaseholds, and Asset Retirement Obligations (Fixed Assets, Net) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	$ 5,934,960	$ 5,865,038
Less: Accumulated depreciation	(1,818,018)	(1,768,465)
Net fixed assets	4,116,942	4,096,573
Crude oil and natural gas pipelines and related assets
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	2,844,999	2,844,288
Onshore facilities, machinery and equipment
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	270,164	269,949
Onshore facilities, machinery and equipment | Alkali Business
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	699,684	701,313
Transportation equipment
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	23,145	22,340
Marine vessels
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	1,010,704	1,017,087
Land, buildings and improvements
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	235,705	231,651
Office equipment, furniture and fixtures
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	24,299	24,271
Construction in progress(1)
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	785,092	712,971
Other
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	$ 41,168	$ 41,168