Fair Value Measurements (Financial Assets And Liabilities Measured At Fair Value On Recurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Mar. 31, 2015	Sep. 30, 2014
Assets:
Money market funds	$ 1,574	$ 86,552	$ 1,527
Trading securities associated with deferred compensation plans	18,359	20,692	20,039
Forward foreign currency exchange contracts	4,354	5,254	5,172
Total financial assets measured and reported at fair value	24,287	112,498	26,738
Liabilities:
Guarantees of bank loans to tobacco growers	1,356	1,674	1,797
Interest rate swap agreements	6,430	3,050	638
Forward foreign currency exchange contracts	13	579	109
Total financial liabilities measured and reported at fair value	7,799	5,303	2,544
Level 1 [Member]
Assets:
Money market funds	0	0	0
Trading securities associated with deferred compensation plans	18,359	20,692	20,039
Forward foreign currency exchange contracts	0	0	0
Total financial assets measured and reported at fair value	18,359	20,692	20,039
Liabilities:
Guarantees of bank loans to tobacco growers	0	0	0
Interest rate swap agreements	0	0	0
Forward foreign currency exchange contracts	0	0	0
Total financial liabilities measured and reported at fair value	0	0	0
Level 2 [Member]
Assets:
Money market funds	1,574	86,552	1,527
Trading securities associated with deferred compensation plans	0	0	0
Forward foreign currency exchange contracts	4,354	5,254	5,172
Total financial assets measured and reported at fair value	5,928	91,806	6,699
Liabilities:
Guarantees of bank loans to tobacco growers	0	0	0
Interest rate swap agreements	6,430	3,050	638
Forward foreign currency exchange contracts	13	579	109
Total financial liabilities measured and reported at fair value	6,443	3,629	747
Level 3 [Member]
Assets:
Money market funds	0	0	0
Trading securities associated with deferred compensation plans	0	0	0
Forward foreign currency exchange contracts	0	0	0
Total financial assets measured and reported at fair value	0	0	0
Liabilities:
Guarantees of bank loans to tobacco growers	1,356	1,674	1,797
Interest rate swap agreements	0	0	0
Forward foreign currency exchange contracts	0	0	0
Total financial liabilities measured and reported at fair value	$ 1,356	$ 1,674	$ 1,797