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Discontinued Operations (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Dec. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Net tax gain $ (222)   $ 0 $ 8,137 $ 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%      
Purchase price consideration   $ 21,000      
Consideration earn-out provision   4,000      
Proceeds from divestiture of businesses   $ 20,500      
Recognition of pre-tax gain on sale of GAS       (10,500)  
Tax expense on disposal       2,400  
Net tax gain       $ (8,100)