Guarantees, Other Contingent Liabilities, And Other Matters (Narrative) (Details) - USD ($)	3 Months Ended	9 Months Ended
	Dec. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Jan. 22, 2019	Dec. 20, 2018	Mar. 31, 2018
Guarantees, Other Contingent Liabilities, and Other Matters [Line Items]
Face amount of guarantee including unpaid accrued interest	$ 30,000,000	$ 30,000,000	$ 36,000,000			$ 20,000,000
Fair value of the guarantees	784,000	784,000	1,149,000			974,000
Other contingent liabilities	1,000,000	$ 1,000,000
Crops supply agreement, term		2 years
Unfair benefit from green tobacco purchase contract		$ 105,000
Net provision for losses (recoveries) on advances and guaranteed loans to suppliers		(3,045,000)	4,375,000
Five-year revolving credit facility					$ 0
Additional borrowings under present line of credit agreement	200,000,000	200,000,000
Long-term debt	370,000,000	370,000,000
Issuance of long-term debt	41,100,000	41,147,000	0
Repayment of long-term debt	(41,100,000)	(41,147,000)	0
Five-year term loan [Member]
Guarantees, Other Contingent Liabilities, and Other Matters [Line Items]
Term loan	$ 150,000,000	150,000,000
Debt Instrument, Term	5 years
Debt Instrument, Basis Spread on Variable Rate	2.94%
Seven-year term loan [Member]
Guarantees, Other Contingent Liabilities, and Other Matters [Line Items]
Term loan	$ 220,000,000	220,000,000
Debt Instrument, Term	7 years
Debt Instrument, Basis Spread on Variable Rate	3.48%
Revolving Credit Facility [Member]
Guarantees, Other Contingent Liabilities, and Other Matters [Line Items]
Five-year revolving credit facility	$ 430,000,000	430,000,000
Debt Instrument, Term	5 years
Advances to suppliers [Member]
Guarantees, Other Contingent Liabilities, and Other Matters [Line Items]
Advances to suppliers current and non-current	$ 120,000,000	120,000,000	136,000,000			150,000,000
Valuation allowances	19,000,000	19,000,000	24,000,000			22,000,000
Recoverable value added tax credits [Member]
Guarantees, Other Contingent Liabilities, and Other Matters [Line Items]
Aggregate balance of recoverable value added tax credits	57,000,000	57,000,000	52,000,000			49,000,000
Valuation allowances	18,000,000	18,000,000	$ 17,000,000			$ 15,000,000
Pending Litigation [Member]
Guarantees, Other Contingent Liabilities, and Other Matters [Line Items]
Loss contingency amount accrued				$ 0
The Company and subsidiary [Member]
Guarantees, Other Contingent Liabilities, and Other Matters [Line Items]
Loss contingency amount accrued	0	0
Fines imposed by FCC		197,000,000
The customer and subsidiary [Member]
Guarantees, Other Contingent Liabilities, and Other Matters [Line Items]
Fines imposed by FCC		1,000,000,000
Cooperatives under contract [Member]
Guarantees, Other Contingent Liabilities, and Other Matters [Line Items]
Growers cooperative		4
Total Cooperatives [Member]
Guarantees, Other Contingent Liabilities, and Other Matters [Line Items]
Growers cooperative		400
Santa Catarina [Member]
Guarantees, Other Contingent Liabilities, and Other Matters [Line Items]
Brazil audit assessment for tax, penalties, and interest on recoverable value added tax credits	12,000,000	12,000,000
Reduced Brazil audit assessment for tax, penalties, and interest on recoverable value added tax credits		13,000,000
Loss contingency amount accrued	0	0
Santa Catarina [Member] | Minimum [Member]
Guarantees, Other Contingent Liabilities, and Other Matters [Line Items]
Estimate of possible loss on remaining VAT audit assessment	0	0
Santa Catarina [Member] | Maximum [Member]
Guarantees, Other Contingent Liabilities, and Other Matters [Line Items]
Estimate of possible loss on remaining VAT audit assessment	13,000,000	13,000,000
Parana [Member]
Guarantees, Other Contingent Liabilities, and Other Matters [Line Items]
Brazil audit assessment for tax, penalties, and interest on recoverable value added tax credits	14,000,000	14,000,000
Reduced Brazil audit assessment for tax, penalties, and interest on recoverable value added tax credits		4,000,000
Loss contingency amount accrued	0	0
Parana [Member] | Minimum [Member]
Guarantees, Other Contingent Liabilities, and Other Matters [Line Items]
Estimate of possible loss on remaining VAT audit assessment	0	0
Parana [Member] | Maximum [Member]
Guarantees, Other Contingent Liabilities, and Other Matters [Line Items]
Estimate of possible loss on remaining VAT audit assessment	$ 4,000,000	$ 4,000,000