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VARIABLE INTEREST ENTITIES AND EQUITY INVESTMENTS AND ADVANCES Aeroleo Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Jul. 01, 2011
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Oct. 01, 2015
Schedule of Equity Method Investments [Line Items]          
Investments in and advances to equity investees   $ 0 $ 0 $ 126  
Percent of voting interest   80.00%      
Assets   $ 764,515 764,863    
Liabilities   $ 304,961 298,125    
Aeroleo          
Schedule of Equity Method Investments [Line Items]          
Ownership 50.00%        
Voting ownership percentage 20.00%        
Investments in and advances to equity investees $ 4,800        
Aeroleo | Equity Method Investee          
Schedule of Equity Method Investments [Line Items]          
Notes receivable to related party $ 6,000        
Notes receivable interest rate 6.00%        
Assets     11,900    
Liabilities     $ 4,500    
Variable Interest Entity, Not Primary Beneficiary | Aeroleo          
Schedule of Equity Method Investments [Line Items]          
Percent of economic interest         50.00%
Percent of voting interest         80.00%