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SUBSEQUENT EVENT (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 23 Months Ended 60 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 24, 2022
Apr. 22, 2030
Apr. 23, 2020
Apr. 09, 2020
Subsequent Event [Line Items]            
Wages and benefits $ 612,000 $ 557,000        
Subsequent Event [Member]            
Subsequent Event [Line Items]            
Total Expected Relief From PSP of CARES Act         $ 992,000  
Unsecured Term Loan through PSP of CARES Act         267,000  
Expected Eligibility for Additional CARES Act Loans         $ 1,100,000  
Limits on Executive Compensation per PSP of CARES Act     $ 425      
Subsequent Event [Member] | ALK Common Stock Warrant [Member]            
Subsequent Event [Line Items]            
Class of Warrant or Right, Exercise Price of Warrants or Rights           $ 31.61
Class of Warrant or Right, Number of Securities Called by Warrants or Rights         846,748  
Subsequent Event [Member] | CARES Act Unsecured Interest Rate Years 1 to 5 [Member] | Unsecured Debt [Member]            
Subsequent Event [Line Items]            
Debt Instrument, Interest Rate, Stated Percentage         1.00%  
Debt Instrument, Basis Spread on Variable Rate       2.00%