Nature Of Operations And Significant Accounting Policies (Narrative) (Details)		12 Months Ended
		Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)
Nature Of Operations And Significant Accounting Policies [Line Items]
Number of countries in which entity operates		30
Dividends received on equity method investments	[1]	$ 5,612,000	$ 4,285,000	$ 2,869,000
Advances to suppliers, current and non-current		199,000,000	153,000,000
Valuation allowance amount related to advances to suppliers		24,000,000	19,000,000
Provision (recoveries) for loss on uncollectible advances to suppliers		10,600,000	6,000,000	5,500,000
Advances to suppliers on which interest has been discontinued		3,000,000	3,000,000
Aggregate balance of recoverable value added tax credits		64,000,000	67,000,000
Valuation allowance on recoverable value added tax credits		21,000,000	22,000,000
Interest costs capitalized		0
Foreign currency remeasurement gain (loss)		(3,900,000)	19,000,000	(8,500,000)
Foreign currency transaction gain (loss)		$ 8,800,000	$ (18,000,000)	$ 1,400,000
Percentage of revenue earned from processing tobacco owned by customers		5.00%
Zimbabwe [Member]
Nature Of Operations And Significant Accounting Policies [Line Items]
Investment in deconsolidated subsidiary		$ 0
Net foreign currency translation loss		$ 7,200,000
Minimum [Member] | Buildings [Member]
Nature Of Operations And Significant Accounting Policies [Line Items]
Estimated useful life		15 years
Minimum [Member] | Processing And Packing Machinery [Member]
Nature Of Operations And Significant Accounting Policies [Line Items]
Estimated useful life		3 years
Minimum [Member] | Transport Equipment [Member]
Nature Of Operations And Significant Accounting Policies [Line Items]
Estimated useful life		3 years
Minimum [Member] | Computer Equipment [Member]
Nature Of Operations And Significant Accounting Policies [Line Items]
Estimated useful life		3 years
Maximum [Member] | Buildings [Member]
Nature Of Operations And Significant Accounting Policies [Line Items]
Estimated useful life		40 years
Maximum [Member] | Processing And Packing Machinery [Member]
Nature Of Operations And Significant Accounting Policies [Line Items]
Estimated useful life		11 years
Maximum [Member] | Transport Equipment [Member]
Nature Of Operations And Significant Accounting Policies [Line Items]
Estimated useful life		10 years
Maximum [Member] | Computer Equipment [Member]
Nature Of Operations And Significant Accounting Policies [Line Items]
Estimated useful life		12 years

[1] In accordance with the applicable accounting guidance, dividends received from unconsolidated affiliates accounted for on the equity method that represent a return on capital (i.e., a return of earnings on a cumulative basis) are presented as operating cash flows in the consolidated statements of cash flows.