Restructuring Costs (Cumulative Restructuring Costs) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring Costs, Total		$ 627	$ 4,391	$ 2,150	$ 4,391
Property, plant and equipment		7,806	13,886	8,307	13,886
Inventory		0	1,702	0	1,702
Asset Impairment Charges, Total		7,806	15,588	8,307	15,588
Restructuring and impairment costs	[1]	8,433	19,979	10,457	19,979
Employee Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Employee termination benefits		627	2,625	2,174	2,625
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Other restructuring costs		$ 0	$ 1,766	$ (24)	$ 1,766

[1] Restructuring and impairment costs are excluded from segment operating income, but are included in consolidated operating income in the consolidated statements of income and comprehensive income. See Note 4 for additional information.