Discontinued Operations - Income Statement Summary of Discontinued Operations (Details) - 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]
Loss from discontinued operations, net of tax	$ (235)	$ (648)	$ (70)	$ (705)
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]
Net sales	8,120	8,474	16,637	17,522
Operating Expense	(9,015)	(9,215)	(17,319)	(18,350)
Loss from discontinued operations before income taxes	(895)	(741)	(682)	(828)
Income tax benefit	(660)	(93)	(612)	(123)
Loss from discontinued operations, net of tax	$ (235)	$ (648)	$ (70)	$ (705)