Business Segment Information (Schedule of Segment Information) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Segment margin	$ 196,190	$ 153,862	$ 572,914	$ 462,095
Total revenues	721,248	518,821	2,074,920	1,543,895
Offshore Pipeline Transportation [Member]
Segment Reporting Information [Line Items]
Total revenues	89,805	69,479	239,958	207,084
Sodium Minerals and Sulfur Services [Member]
Segment Reporting Information [Line Items]
Total revenues	312,681	237,651	916,963	702,025
Onshore Facilities and Transportation [Member]
Segment Reporting Information [Line Items]
Total revenues	240,967	162,975	708,110	498,113
Marine Transportation [Member]
Segment Reporting Information [Line Items]
Total revenues	77,795	48,716	209,889	136,673
Operating Segments
Segment Reporting Information [Line Items]
Segment margin	196,190	153,862	572,914	462,095
Capital expenditures	151,768	79,217	313,470	227,221
Total revenues	721,248	518,821	2,074,920	1,543,895
Operating Segments | Offshore Pipeline Transportation [Member]
Segment Reporting Information [Line Items]
Segment margin	91,402	76,045	281,286	243,420
Capital expenditures	86,893	3,819	166,703	34,768
Total revenues	89,805	69,479	239,958	207,084
Operating Segments | Sodium Minerals and Sulfur Services [Member]
Segment Reporting Information [Line Items]
Segment margin	80,067	39,649	219,143	121,563
Capital expenditures	49,452	67,583	114,698	158,181
Total revenues	315,334	240,048	924,534	708,612
Operating Segments | Onshore Facilities and Transportation [Member]
Segment Reporting Information [Line Items]
Segment margin	9,442	29,145	27,496	72,512
Capital expenditures	848	929	3,365	4,515
Total revenues	238,483	161,296	700,909	493,852
Operating Segments | Marine Transportation [Member]
Segment Reporting Information [Line Items]
Segment margin	15,279	9,023	44,989	24,600
Capital expenditures	14,575	6,886	28,704	29,757
Total revenues	77,626	47,998	209,519	134,347
Intersegment
Segment Reporting Information [Line Items]
Total revenues	0	0	0	0
Intersegment | Offshore Pipeline Transportation [Member]
Segment Reporting Information [Line Items]
Total revenues	0	0	0	0
Intersegment | Sodium Minerals and Sulfur Services [Member]
Segment Reporting Information [Line Items]
Total revenues	(2,653)	(2,397)	(7,571)	(6,587)
Intersegment | Onshore Facilities and Transportation [Member]
Segment Reporting Information [Line Items]
Total revenues	2,484	1,679	7,201	4,261
Intersegment | Marine Transportation [Member]
Segment Reporting Information [Line Items]
Total revenues	$ 169	$ 718	$ 370	$ 2,326