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DESCRIPTION OF THE BUSINESS (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2025 segment	Sep. 30, 2024 segment	Sep. 30, 2025 segment facility	Sep. 30, 2024 segment
DESCRIPTION OF THE BUSINESS
Number of reportable segments | segment	2	2	2	2
Ocean Transportation | SSAT
DESCRIPTION OF THE BUSINESS
Ownership interest in SSAT (as a percent)	35.00%		35.00%
Number of terminal facilities on which SSAT provides terminal and stevedoring services on the U.S. West Coast			8
MatNav | SSAT
DESCRIPTION OF THE BUSINESS
Number of terminal facilities on which SSAT provides terminal and stevedoring services on the U.S. West Coast			3

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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