v3.26.1
INVESTMENTS - Share of Equity of Income (Loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Schedule of Equity Method Investments [Line Items]        
Equity in (losses) earnings of unconsolidated entities $ (560) $ (1,995) $ (1,078) $ 3,319
Intermodal Finance I, Ltd.        
Schedule of Equity Method Investments [Line Items]        
Equity in (losses) earnings of unconsolidated entities 0 0 0 50
Long Ridge Energy & Power LLC        
Schedule of Equity Method Investments [Line Items]        
Equity in (losses) earnings of unconsolidated entities 0 0 0 10,899
Long Ridge West Virginia LLC        
Schedule of Equity Method Investments [Line Items]        
Equity in (losses) earnings of unconsolidated entities 0 0 0 (311)
GM-FTAI Holdco LLC        
Schedule of Equity Method Investments [Line Items]        
Equity in (losses) earnings of unconsolidated entities 0 (1,895) 0 (7,110)
Clean Planet Energy USA LLC        
Schedule of Equity Method Investments [Line Items]        
Equity in (losses) earnings of unconsolidated entities 0 (100) 0 (209)
Pyroplast Energy LTD        
Schedule of Equity Method Investments [Line Items]        
Equity in (losses) earnings of unconsolidated entities $ (560) $ 0 $ (1,078) $ 0