Restructuring Costs (Cumulative Restructuring Costs) (Details) - USD ($) $ in Thousands		12 Months Ended
		Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring costs		$ 2,150	$ 8,705	$ 5,356
Asset impairment charges		8,307	13,872	2,187
Restructuring and impairment costs	[1]	10,457	22,577	7,543
Employee Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Employee termination benefits		2,174	5,237	5,356
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Other restructuring costs		(24)	3,468	0
Farmer loans and property and equipment		$ 8,307	$ 13,872	$ 2,187

[1] Restructuring and impairment costs are excluded from reportable segment operating income, but are included in consolidated operating income in the consolidated statements of income (see Note 4)