Fair Value Measurements (Tables)

9 Months Ended

Dec. 31, 2012

Fair Value Disclosures [Abstract]

Financial Assets And Liabilities Measured At Fair Value On Recurring Basis

	December 31, 2012
(in thousands of dollars)	Level 1		Level 2		Level 3		Total
Assets
Money market funds	$	136,528	$	—	$	—	$	136,528
Trading securities associated with deferred compensation plans	18,907		—		—		18,907
Forward foreign currency exchange contracts	—		239		—		239
Total financial assets measured and reported at fair value	$	155,435	$	239	$	—	$	155,674
Liabilities
Guarantees of bank loans to tobacco growers	$	—	$	—	$	5,025	$	5,025
Interest rate swap agreements	—		1,889		—		1,889
Forward foreign currency exchange contracts	—		537		—		537
Total financial liabilities measured and reported at fair value	$	—	$	2,426	$	5,025	$	7,451

	December 31, 2011
(in thousands of dollars)	Level 1		Level 2		Level 3		Total
Assets
Money market funds	$	100,728	$	—	$	—	$	100,728
Trading securities associated with deferred compensation plans	18,263		—		—		18,263
Forward foreign currency exchange contracts	—		15		—		15
Total financial assets measured and reported at fair value	$	118,991	$	15	$	—	$	119,006
Liabilities
Guarantees of bank loans to tobacco growers	$	—	$	—	$	4,837	$	4,837
Interest rate swap agreements	—		820		—		820
Forward foreign currency exchange contracts	—		537		—		537
Total financial liabilities measured and reported at fair value	$	—	$	1,357	$	4,837	$	6,194

	March 31, 2012
(in thousands of dollars)	Level 1		Level 2		Level 3		Total
Assets
Money market funds	$	48,546	$	—	$	—	$	48,546
Trading securities associated with deferred compensation plans	19,803		—		—		19,803
Forward foreign currency exchange contracts	—		356		—		356
Total financial assets measured and reported at fair value	$	68,349	$	356	$	—	$	68,705
Liabilities
Guarantees of bank loans to tobacco growers	$	—	$	—	$	5,932	$	5,932
Interest rate swap agreements	—		1,119		—		1,119
Forward foreign currency exchange contracts	—		1,352		—		1,352
Total financial liabilities measured and reported at fair value	$	—	$	2,471	$	5,932	$	8,403

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

	Nine Months Ended December 31,
(in thousands of dollars)	2012			2011
Balance at beginning of year	$	5,932		$	20,699
Transfer to allowance for loss on direct loans to farmers (removal of prior crop year and other loans from portfolio)	(5,609		)	(19,123		)
Transfer from allowance for loss on direct loans to farmers (addition of current crop year loans)	4,825			4,276
Change in discount rate and estimated collection period	96			676
Currency remeasurement	(219		)	(1,691		)
Balance at end of period	$	5,025		$	4,837