Segment Data (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) Segment	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | Segment	2
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]	srt:ChiefExecutiveOfficerMember
Segment Reporting, CODM, Profit (Loss) Measure, How Used, Descriptio	The CODM evaluates the performance of the Company’s segments based on the contributions to operating income of the respective segments, and before income taxes, interest, gains or losses on disposition of assets, other nonoperating income, noncontrolling interests, accounting changes, and nonrecurring items. The CODM uses segment operating income to allocate resources for each segment during the annual budget and forecasting process. The CODM considers budget-to-actual variances on a monthly basis for segment operating income when making decisions about allocating capital and personnel to the segments. The CODM also uses segment operating income to assess the performance for each segment by comparing the results and return on assets of each segment with one another.
Revenues [Abstract]
Revenue	$ 3,265,876	$ 3,091,640	$ 2,784,754
Earnings before taxes on income	362,763	294,125	164,975
Total assets	5,851,952	5,722,197
Capital expenditures	342,660	401,730	172,606
Other Assets [Abstract]
Investment in affiliates	2,900	2,576
Marine Transportation [Member]
Revenues [Abstract]
Revenue	1,913,050	1,721,937	1,616,967
Distribution and Services [Member]
Revenues [Abstract]
Revenue	1,352,826	1,369,703	1,167,787
Other [Member]
Other Assets [Abstract]
General corporate assets	154,655	108,306
Investment in affiliates	2,900	2,576
Total other assets	157,555	110,882
Reportable Segments [Member]
Revenues [Abstract]
Revenue	3,265,876	3,091,640	2,784,754
Earnings before taxes on income	471,978	353,424	203,221
Total assets	5,851,952	5,722,197
Capital expenditures	342,660	401,730	172,606
Reportable Segments [Member] | Marine Transportation [Member]
Revenues [Abstract]
Revenue	1,913,050	1,721,937	1,616,967
Earnings before taxes on income	363,376	238,943	136,184
Total assets	4,578,616	4,454,931
Capital expenditures	247,768	255,411	147,170
Reportable Segments [Member] | Distribution and Services [Member]
Revenues [Abstract]
Revenue	1,352,826	1,369,703	1,167,787
Earnings before taxes on income	108,602	114,481	67,037
Total assets	1,115,781	1,156,384
Capital expenditures	85,437	140,769	21,713
Reportable Segments [Member] | Other [Member]
Revenues [Abstract]
Total assets	157,555	110,882
Capital expenditures	9,455	5,550	3,723
Intersegment Eliminations [Member]
Revenues [Abstract]
Revenue	26,100	39,800	31,900
Earnings before taxes on income	$ 2,600	$ 4,000	$ 3,200