Fair Value Measurements (Reconciliation Of Change In Balance Of Financial Liability For Guarantees Of Bank Loans To Tobacco Growers) (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
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)	(1,848)	(1,841)
Provision for loss or transfers from allowance for loss on direct loans to farmers (addition of current crop year loans)	1,756	1,821
Change in discount rate and estimated collection period	26	33
Currency remeasurement	160	(331)
Balance at end of period	$ 1,722	$ 1,356