Restructuring and Asset Impairment Charges Employee Separation and Other Cash Charges (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Restructuring Reserve [Roll Forward]
Beginning balance	$ 398	$ 8,087	$ 397
Period charges	637	164	8,618
Payments	(846)	(7,853)	(928)
Ending balance March 31	189	398	8,087
Operating Segments | North America
Restructuring Reserve [Roll Forward]
Beginning balance	0	0	0
Period charges	180	0	0
Payments	(120)	0	0
Ending balance March 31	60	0	0
Operating Segments | Other Regions
Restructuring Reserve [Roll Forward]
Beginning balance	398	8,087	397
Period charges	457	164	8,618
Payments	(726)	(7,853)	(928)
Ending balance March 31	$ 129	$ 398	$ 8,087