Significant Accounting Policies Property, Plant and Equipment (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2010
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 417,170	$ 380,532
Accumulated depreciation	157,491	143,444
Total property, plant and equipment, net	259,679	237,088
Property and equipment purchases	42,347	70,608	18,135
Property and equipment purchases, amount upaid	776	3,141	2,112
Tobacco processing facilty purchase		43,775
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	27,991	25,295
Building [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	202,153	184,888
Useful life, minimum (in years)	20
Useful life, maximum (in years)	30
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	187,026	170,349
Useful life, minimum (in years)	3
Useful life, maximum (in years)	10
Cost of Sales [Member]
Property, Plant and Equipment [Line Items]
Depreciation expense	24,712	20,699	21,714
Operating Expense [Member]
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 3,717	$ 2,915	$ 2,933