Nature Of Operations And Significant Accounting Policies (Narrative) (Details) (USD $)	12 Months Ended
	Mar. 31, 2015		Mar. 31, 2014		Mar. 31, 2013
Nature Of Operations And Significant Accounting Policies [Line Items]
Number of countries in which entity operates	30
Dividends received on equity method investments	$ 5,228,000	[1]	$ 6,508,000	[1]	$ 122,000	[1]
Advances to suppliers, current and non-current	156,000,000		190,000,000
Valuation allowance amount related to advances to suppliers	35,000,000		46,000,000
Provision for loss on uncollectible advances to suppliers	3,700,000		5,500,000		1,600,000
Advances to suppliers on which interest has been discontinued	15,000,000		23,000,000
Aggregate balance of recoverable value added tax credits	60,000,000		66,000,000
Valuation allowance on recoverable value added tax credits	23,000,000		30,000,000
Interest costs capitalized	0		0		0
Amount charged for goodwill impairment	0		0		0
Impairment of property, plant and equipment	0		0		0
Foreign currency remeasurement gain (loss)	28,800,000		14,300,000		10,600,000
Foreign currency transaction gain (loss)	17,700,000		(6,000,000)		(1,000,000)
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		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	10 years

[1] (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.