Significant Accounting Policies Advances to Tobacco Suppliers (Details) - USD ($)	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Accounting Policies [Abstract]
Markup and capitalized interest on tobacco advances	$ 14,208,000	$ 19,823,000
Unrecoverable advances and other capitalized costs	8,535,000	11,404,000
Current	41,837,000	37,767,000
Noncurrent	2,612,000	3,758,000
Advances to tobacco suppliers, total	44,449,000	41,525,000
Unrecoverable advances and other capitalized costs, expense	$ 0	$ 1,085,000	$ 11,587,000