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, 2015	Sep. 30, 2014
Fair Value Disclosures [Abstract]
Balance at beginning of year	$ 1,674	$ 2,270
Payments under the guarantees and transfers to allowance for loss on direct loans to farmers (removal of prior crop year loans from portfolio)	(1,841)	(2,392)
Provision for loss or transfers from allowance for loss on direct loans to farmers (addition of current crop year loans)	1,821	2,022
Change in discount rate and estimated collection period	33	36
Currency remeasurement	(331)	(139)
Balance at end of period	$ 1,356	$ 1,797