Annual report pursuant to Section 13 and 15(d)

INCOME TAXES Narrative (Details)

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INCOME TAXES Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2018
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Operating Loss Carryforwards [Line Items]        
Valuation allowance $ 37,869 $ 37,869 $ 34,967  
Deferred tax liabilities, foreign earnings 200 200    
Earnings not permanently reinvested, joint venture tax basis 23,600 23,600    
Unrecognized tax benefits, penalties and accrued interest 100 100    
Income tax benefit   2,940 (122,665) $ (3,357)
Tax Act, adjustment to deferred tax balances     70,000  
Tax Act, adjustment to deferred tax   200    
Domestic Tax Authority        
Operating Loss Carryforwards [Line Items]        
Operating loss carryforwards 0 0 0  
State and Local Jurisdiction        
Operating Loss Carryforwards [Line Items]        
Operating loss carryforwards 377,700 377,700 411,300  
Valuation allowance 18,100 18,100    
Foreign Tax Authority        
Operating Loss Carryforwards [Line Items]        
Operating loss carryforwards 56,900 56,900 58,500  
Tax credit carryforward     $ 1,500  
Valuation allowance 19,800 19,800    
Aeroleo | Foreign Tax Authority        
Operating Loss Carryforwards [Line Items]        
Valuation allowance 18,600 18,600    
Income tax benefit 3,500      
Sicher | Foreign Tax Authority        
Operating Loss Carryforwards [Line Items]        
Valuation allowance $ 1,200 $ 1,200