(Gain) Loss on Write-Down and Disposal of Long-Lived Assets Impairment Charges (Phantom) - USD ($)	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Property, Plant and Equipment [Line Items]
Asset Impairment Charges	$ 1,000,000	$ 184,000	$ 10,300,000
Write down of long-lived assets