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VARIABLE INTEREST ENTITIES ("VIEs") - Summary of assets and liabilities of lessor VIEs (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Assets      
Restricted cash and short-term deposits (note 15) $ 134,043 $ 106,073  
Liabilities      
Current portion of long-term debt and short-term debt (344,778) (703,170)  
Long-term debt (844,546) (920,130)  
Total liabilities (1,379,386) (2,770,378)  
Statement of operations      
Interest expense 19,286 34,486 $ 39,182
Continuing operations      
Statement of cash flows      
Net debt repayments (719,917) (289,148) (745,445)
Net debt receipts 276,640 411,866 624,901
Capitalized financing costs (9,599) (13,300) (13,300)
Discontinued operations      
Statement of cash flows      
Net debt repayments (158,000) (268,107) (189,088)
Net debt receipts 0 168,402 104,806
Capitalized financing costs (280) (3,700) (1,277)
Variable interest entity, primary beneficiary      
Assets      
Restricted cash and short-term deposits (note 15) 21,691 16,523  
Liabilities      
Current portion of long-term debt and short-term debt (337,547) (380,554)  
Long-term debt (156,563) (216,313)  
Total liabilities (494,110) (596,867)  
Variable interest entity, primary beneficiary | Continuing operations      
Statement of operations      
Interest expense 8,406 5,178 11,687
Statement of cash flows      
Net debt repayments (123,554) (97,056) (446,484)
Net debt receipts 20,640 2,848 354,901
Capitalized financing costs 0 0 (3,731)
Variable interest entity, primary beneficiary | Discontinued operations      
Statement of operations      
Interest expense 3,814 17,492 23,046
Statement of cash flows      
Net debt repayments 0 (234,873) (104,179)
Net debt receipts 0 10,402 104,806
Capitalized financing costs $ 0 $ (1,568) $ (200)