Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Abstract]
Revenues by major source	$ 745,843	$ 598,920	$ 2,054,589	$ 1,655,394
Revenue recognized			54,600	40,300
Marine Transportation [Member]
Disaggregation of Revenue [Abstract]
Revenues by major source	433,040	338,514	1,194,231	972,352
Marine Transportation [Member] | Inland Transportation [Member]
Disaggregation of Revenue [Abstract]
Revenues by major source	345,052	255,791	939,910	733,830
Marine Transportation [Member] | Coastal Transportation [Member]
Disaggregation of Revenue [Abstract]
Revenues by major source	87,988	82,723	254,321	238,522
Distribution and Services [Member]
Disaggregation of Revenue [Abstract]
Revenues by major source	312,803	260,406	860,358	683,042
Distribution and Services [Member] | Commercial and Industrial [Member]
Disaggregation of Revenue [Abstract]
Revenues by major source	165,361	153,056	474,515	426,930
Distribution and Services [Member] | Oil and Gas [Member]
Disaggregation of Revenue [Abstract]
Revenues by major source	$ 147,442	$ 107,350	$ 385,843	$ 256,112