Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2024

Accounting Policies [Abstract]

Summary of Balances of Property and Equipment - Net

The following table summarizes the balances of property and equipment – net (in thousands):

	December 31,
	2024			2023
Land	$	38,157		$	39,567
Marine transportation equipment		5,234,475			5,029,653
Buildings and other equipment		745,897			641,871
Construction in progress		104,679			112,947
	$	6,123,208		$	5,824,038
Accumulated depreciation		(2,100,242	)		(1,962,933	)
Property and equipment – net	$	4,022,966		$	3,861,105

Changes in Goodwill

The following table summarizes the changes in goodwill (in thousands):

	Marine Transportation			Distribution and Services			Total
Balance at December 31, 2023 and 2024 (gross)		505,784			560,155			1,065,939
Accumulated impairment and amortization		(237,626	)		(389,565	)		(627,191	)
Balance at December 31, 2023 and 2024	$	268,158		$	170,590		$	438,748

Other Intangible Assets and Other Intangible Liabilities

The following table summarizes the balances of other intangible assets (in thousands):

	December 31,
	2024			2023
Other intangible assets – gross	$	182,708		$	184,622
Accumulated amortization		(148,302	)		(141,695	)
Other intangible assets – net	$	34,406		$	42,927