Revenues (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Abstract]
Revenues by major source	$ 3,091,640	$ 2,784,754	$ 2,246,660
Revenue recognized	84,000	61,700	40,900
Marine Transportation [Member]
Disaggregation of Revenue [Abstract]
Revenues by major source	1,721,937	1,616,967	1,322,918
Marine Transportation [Member] | Inland Transportation [Member]
Disaggregation of Revenue [Abstract]
Revenues by major source	1,416,483	1,277,010	1,005,145
Marine Transportation [Member] | Coastal Transportation [Member]
Disaggregation of Revenue [Abstract]
Revenues by major source	305,454	339,957	317,773
Distribution and Services [Member]
Disaggregation of Revenue [Abstract]
Revenues by major source	1,369,703	1,167,787	923,742
Distribution and Services [Member] | Commercial and Industrial [Member]
Disaggregation of Revenue [Abstract]
Revenues by major source	802,474	651,566	578,011
Distribution and Services [Member] | Oil and Gas [Member]
Disaggregation of Revenue [Abstract]
Revenues by major source	$ 567,229	$ 516,221	$ 345,731