Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2022

Summary of Significant Accounting Policies [Abstract]

Changes in Goodwill

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

	Marine Transportation			Distribution and Services			Total
Balance at December 31, 2020 (gross)	$	505,784		$	560,155		$	1,065,939
Accumulated impairment and amortization		(18,574	)		(389,565	)		(408,139	)
Balance at December 31, 2020		487,210			170,590			657,800
Impairment		(219,052	)		—			(219,052	)
Balance at December 31, 2021 (gross)		505,784			560,155			1,065,939
Accumulated impairment and amortization		(237,626	)		(389,565	)		(627,191	)
Balance at December 31, 2021 and 2022	$	268,158		$	170,590		$	438,748

Other Intangible Assets and Other Intangible Liabilities

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

	December 31,
	2022			2021
Other intangible assets – gross	$	203,242		$	203,217
Accumulated amortization		(151,779	)		(143,147	)
Other intangible assets – net	$	51,463		$	60,070
Other intangible liabilities – gross	$	13,860		$	13,860
Accumulated amortization		(13,280	)		(12,120	)
Other intangible liabilities – net	$	580		$	1,740