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Discontinued Operations (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Gain on sale of discontinued operations, net of tax $ 8,359 $ 0 $ 8,359 $ 0
Discontinued Operations, Disposed of by Sale | Global Aviation Services, LLC        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
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 (10,800)      
Tax expense on disposal 2,400      
Gain on sale of discontinued operations, net of tax $ 8,400