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CAPITAL IMPROVEMENTS IN PROGRESS AND NEWBUILDINGS (Narrative) (Details)
$ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2025
USD ($)
vessel
Dec. 31, 2024
USD ($)
vessel
Jun. 30, 2025
rig
Dec. 31, 2024
rig
Impaired Long-Lived Assets Held and Used [Line Items]        
Number of container vessels under construction | vessel 5      
Interest costs capitalized | $ $ 4.2 $ 2.9    
Construction in Progress        
Impaired Long-Lived Assets Held and Used [Line Items]        
Number of vessels being upgraded 3 4 2 2