Business Segment Information (Schedule of Total Assets by Reportable Segment) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
TOTAL ASSETS	$ 6,365,992	$ 5,905,801
Operating Segments | Offshore pipeline transportation
Segment Reporting Information [Line Items]
TOTAL ASSETS	2,290,488	2,103,140
Operating Segments | Sodium minerals and sulfur services
Segment Reporting Information [Line Items]
TOTAL ASSETS	2,358,086	2,132,588
Operating Segments | Onshore facilities and transportation
Segment Reporting Information [Line Items]
TOTAL ASSETS	981,354	923,064
Operating Segments | Marine transportation
Segment Reporting Information [Line Items]
TOTAL ASSETS	681,231	703,030
Other assets
Segment Reporting Information [Line Items]
TOTAL ASSETS	$ 54,833	$ 43,979