Fair Value Measurements (Reconciliation Of Change In Balance Of Financial Liability For Guarantees Of Bank Loans To Tobacco Growers) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Fair Value Disclosures [Abstract]
Balance at beginning of year	$ 4,235	$ 5,932
Payments under the guarantees and transfers to allowance for loss on direct loans to farmers (removal of prior crop year loans from portfolio)	(5,202)	(5,651)
Provision for loss or transfer from allowance for loss on direct loans to farmers (addition of current crop year loans)	5,498	2,197
Change in discount rate and estimated collection period	25	37
Currency remeasurement	(102)	(188)
Balance at end of period	$ 4,454	$ 2,327