Discontinued Operations Discontinued Operations - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Net sales and net operating (loss) from discontinued operations
Net sales		$ 5,600
Disposal Group, Including Discontinued Operation, Operating Income (Loss)		300
Machinery Division [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Revenue	$ 0	0	$ 0
Net sales and net operating (loss) from discontinued operations
Disposal Group, Including Discontinued Operation, Operating Income (Loss)	$ 0	$ 0	$ 0