Restructuring Costs (Narrative) (Details) - USD ($) $ in Thousands		12 Months Ended
		Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs	[1]	$ 3,523	$ 0	$ 10,457
Tobacco Operations
Restructuring Cost and Reserve [Line Items]
Employee termination benefits				2,200
Other restructuring costs		1,700
Sales agreement to sell common stock of subsidiary company, value			$ 8,500
Restructuring and impairment costs		$ 1,800
Ingredients Operations
Restructuring Cost and Reserve [Line Items]
Gain (Loss) on Disposition of Property Plant Equipment				1,200
Tanzania | Tobacco Operations
Restructuring Cost and Reserve [Line Items]
Asset impairment charges				$ 9,400

[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)