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SHORT-TERM AND LONG-TERM DEBT (Lease Debt Financing Facilities) (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2024
Dec. 31, 2023
$65 million lease debt financing    
Debt Instrument [Line Items]    
Sales price for the vessel $ 65.0  
Term of lease or charter (in years) 6 years  
Long-term debt $ 45.7 $ 49.4
$65 million lease debt financing    
Debt Instrument [Line Items]    
Sales price for the vessel $ 65.0  
Term of lease or charter (in years) 6 years  
Long-term debt $ 45.9 49.5
$23.5 million lease debt financing    
Debt Instrument [Line Items]    
Sales price for the vessel $ 23.5  
Term of lease or charter (in years) 3 years  
Long-term debt $ 14.1 16.3
$25.3 million lease debt financing    
Debt Instrument [Line Items]    
Sales price for the vessel $ 25.3  
Term of lease or charter (in years) 3 years  
Long-term debt $ 15.7 18.0
$120 million lease debt financing    
Debt Instrument [Line Items]    
Sales price for the vessel $ 120.0  
Term of lease or charter (in years) 8 years  
Long-term debt $ 103.2 108.4
$120 million lease debt financing    
Debt Instrument [Line Items]    
Sales price for the vessel $ 120.0  
Term of lease or charter (in years) 8 years  
Long-term debt $ 104.6 109.7
$45 million lease debt financing    
Debt Instrument [Line Items]    
Sales price for the vessel $ 45.0  
Term of lease or charter (in years) 5 years  
Long-term debt $ 39.2 41.7
$38.5 million lease debt financing    
Debt Instrument [Line Items]    
Sales price for the vessel $ 38.5  
Term of lease or charter (in years) 9 years  
Long-term debt $ 36.0 37.3
$72.2 million lease debt financing    
Debt Instrument [Line Items]    
Sales price for the vessel $ 72.2  
Term of lease or charter (in years) 12 years  
Long-term debt $ 69.5 71.2
$72.2 million lease debt financing    
Debt Instrument [Line Items]    
Sales price for the vessel $ 72.2  
Term of lease or charter (in years) 12 years  
Long-term debt $ 70.2 72.0
$77.5 million lease debt financing    
Debt Instrument [Line Items]    
Sales price for the vessel $ 77.5  
Term of lease or charter (in years) 12 years  
Long-term debt $ 75.8 0.0
$77.5 million lease debt financing    
Debt Instrument [Line Items]    
Sales price for the vessel $ 77.5  
Term of lease or charter (in years) 12 years  
Long-term debt $ 76.6 0.0
$37 million lease debt financing    
Debt Instrument [Line Items]    
Sales price for the vessel $ 37.0  
Term of lease or charter (in years) 8 years  
Long-term debt $ 37.0 0.0
Lease debt financing    
Debt Instrument [Line Items]    
Long-term debt $ 733.5 $ 573.5