INVESTMENTS - Equity in (losses) earnings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]
Income (loss) from equity method investments	$ 12,303	$ (55,496)	$ (24,707)
Intermodal Finance I, Ltd.
Schedule of Equity Method Investments [Line Items]
Income (loss) from equity method investments	50	40	56
Long Ridge Energy & Power LLC
Schedule of Equity Method Investments [Line Items]
Income (loss) from equity method investments	10,899	(29,950)	(9,556)
GM-FTAI Holdco LLC
Schedule of Equity Method Investments [Line Items]
Income (loss) from equity method investments	(7,110)	(17,052)	(12,285)
Clean Planet Energy USA LLC
Schedule of Equity Method Investments [Line Items]
Income (loss) from equity method investments	(374)	(1,338)	(2,529)
Long Ridge West Virginia LLC
Schedule of Equity Method Investments [Line Items]
Income (loss) from equity method investments	(311)	(7,196)	(393)
The Wheeling Corporation
Schedule of Equity Method Investments [Line Items]
Income (loss) from equity method investments	9,223	0	0
Pyroplast Energy LTD
Schedule of Equity Method Investments [Line Items]
Income (loss) from equity method investments	$ (74)	$ 0	$ 0

- Definition

Amount of income (loss) for proportionate share of equity method investee's income (loss).

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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FTAI Infrastructure Inc. 10-K