Restructuring and Asset Impairment Charges - Non-Cash Charges (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Restructuring Cost and Reserve [Line Items]
Noncash charges	$ 1,054	$ 891	$ 404
Leaf - North America
Restructuring Cost and Reserve [Line Items]
Noncash charges	0	545	0
Leaf - Other Regions
Restructuring Cost and Reserve [Line Items]
Noncash charges	772	346	404
Other Products and Services
Restructuring Cost and Reserve [Line Items]
Noncash charges	$ 282	$ 0	$ 0