Business Segment Information (Schedule of Revenues by Segment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Total Segment Margin	$ 770,055	$ 617,729	$ 607,473
Total revenues	2,788,957	2,125,476	1,824,655
Offshore pipeline transportation
Segment Reporting Information [Line Items]
Total revenues	319,045	278,459	237,146
Sodium minerals and sulfur services
Segment Reporting Information [Line Items]
Total revenues	1,248,085	964,632	877,769
Onshore facilities and transportation
Segment Reporting Information [Line Items]
Total revenues	928,532	691,558	499,482
Marine transportation
Segment Reporting Information [Line Items]
Total revenues	293,295	190,827	210,258
Operating Segments
Segment Reporting Information [Line Items]
Total Segment Margin	770,055	617,729	607,473
Capital Expenditures	460,926	316,729	144,324
Total revenues	2,788,957	2,125,476	1,824,655
Operating Segments | Offshore pipeline transportation
Segment Reporting Information [Line Items]
Total Segment Margin	363,373	317,560	270,078
Capital Expenditures	241,446	50,546	13,323
Total revenues	319,045	278,459	237,123
Operating Segments | Sodium minerals and sulfur services
Segment Reporting Information [Line Items]
Total Segment Margin	306,718	166,773	130,083
Capital Expenditures	174,518	227,118	95,511
Total revenues	1,258,236	973,354	886,078
Operating Segments | Onshore facilities and transportation
Segment Reporting Information [Line Items]
Total Segment Margin	33,755	98,824	147,254
Capital Expenditures	5,878	4,609	4,133
Total revenues	918,751	685,652	500,420
Operating Segments | Marine transportation
Segment Reporting Information [Line Items]
Total Segment Margin	66,209	34,572	60,058
Capital Expenditures	39,084	34,456	31,357
Total revenues	292,925	188,011	201,034
Intersegment
Segment Reporting Information [Line Items]
Total revenues	0	0	0
Intersegment | Offshore pipeline transportation
Segment Reporting Information [Line Items]
Total revenues	0	0	23
Intersegment | Sodium minerals and sulfur services
Segment Reporting Information [Line Items]
Total revenues	(10,151)	(8,722)	(8,309)
Intersegment | Onshore facilities and transportation
Segment Reporting Information [Line Items]
Total revenues	9,781	5,906	(938)
Intersegment | Marine transportation
Segment Reporting Information [Line Items]
Total revenues	$ 370	$ 2,816	$ 9,224