Fair Value Measurements (Reconciliation Of Change In Balance Of Financial Liability For Guarantees Of Bank Loans To Tobacco Growers) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Balance at beginning of year	$ 1,628	$ 1,674
Payments under the guarantees and transfers to allowance for loss on direct loans to farmers (removal of prior crop year loans from portfolio)	(2,550)	(1,826)
Provision for loss or transfer from allowance for loss on direct loans to farmers (addition of current crop year loans)	1,854	1,834
Change in discount rate and estimated collection period	59	106
Currency remeasurement	186	(160)
Balance at end of period	$ 1,177	$ 1,628