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DISCONTINUED OPERATIONS - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Sep. 30, 2019
Sep. 30, 2019
Mar. 31, 2021
Mar. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations        
Gain on sale of discontinued operations, net of tax     $ 4 $ 8,179
Discontinued Operations, Disposed of by Sale        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations        
Gain on sale of discontinued operations, net of tax       $ 8,200
Discontinued Operations, Disposed of by Sale | Global Aviation Services, LLC        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations        
Ownership percentage 100.00% 100.00%    
Purchase price consideration $ 21,000 $ 21,000    
Consideration earn-out provision 4,000 4,000    
Proceeds from divestiture of businesses $ 20,500      
Recognition of pre-tax gain on sale of GAS   10,500    
Tax expense on disposal   2,300    
Gain on sale of discontinued operations, net of tax   $ 8,200